Roto Grip Duo Bowling Ball

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Roto Grip is proud to announce its partnership & support of Big Brothers Big Sisters of America. With the assistance of our very own mentoring duo, “The Shafanie Duo”, we will not only be supporting BBBS at various events across the country, but we will also be donating 5% of our sales to domestic distributors to aid in the development and support of children within the program. So, if you are looking to make a difference both ON and OFF the lanes, then the DUO is the right choice for you!

Color Black/Electric Green
Coverstock MicroTrax™ Pearl Reactive
Core Mentor™ Core
RG 2.49
Differential 0.046
Intermediate Diff n/a
Factory finish Reacta Gloss
Weights 10 thru 16lbs

46 Reviews

  • RG Duo

    Posted by Cooper Mathewson on Sep 16th 2023

    The RG Duo Latest addition to the HP3 line RG of 2.49 diff of .046. Mentor Core MicroTrax Pearl Cover So far everything I see out of the Duo seems to look good. The ball is versatile. Can get left (as a righty) and create angle or can get a straighter and it will help me get a forward roll. Having the same cover as the Exotic Gem, I expected a earlier, forward rolling the ability to get this to skid/flip is nice. The Duo is something I can move down to when my DNA or TNT are forcing me to move left too early. It will be a popular house shot ball. Many different bowling styles will see the Duo scoring.

  • Roto Grip Duo

    Posted by Joel Donner on Sep 15th 2023

    About Me 900 Global Staff Left Handed: High Rev High Speed Player Pap: - 47/8 +1 Rev Rate: +-500 Speed 17 mph Layout: 70 X 3¾ X 30 Ball Video: N/A The Roto Grip Duo is what I like to call a “Pallet Ball.” What I mean by this is that I would love to buy a pallet of them and keep drilling this ball up. The Duo is so clean and controllable from the front part of the lane to the backend. Speaking of the backend, it is so predictable with incredible finishing power. The amount of mistake area that I can create with this ball is ridiculous. This ball is going to be a benchmark ball for me and will be the first ball out of back on any pattern I throw with. The Duo has been able to replace quite a few balls in my arsenal because of the versatility I have in throwing this. It would be in your best interest to get a Duo and put one in your bag, not only will you bowl well with it but 5% is going to go to charity. One of the best balls I have ever thrown and that is saying quite a bit. Joel Donner 900 Global Staff Member Cedar Rapids, IA #StormNation #StrikingWorldwide #RGSquad #Iambowling #teamiambowling #bowlingisfun

  • Roto Grip DUO

    Posted by Sandra McIntire on Sep 15th 2023

    I am a higher speed, rev challenged 220-250ish, high tilt, high rotation, and super low track player, I drilled my Roto Grip DUO 5x 3 1/2 x 1 3/4 using the Storm VLS and my axis point is 3 ¼ right and 7/8 up. The Roto Grip DUO is middle of the road pearl symmetric benchmark ball that is easy through the front of the lane with great continuation down lane without being too angular. Overall, the ball is responsive and I see myself using this on house shots or medium volume patterns. My YouTube video of the ball can be found at:

  • Amazing ball for and Amazing cause!

    Posted by Brandon Boyer on Sep 14th 2023

    As soon as I saw one picture of this ball I knew we were in for a good one! First and foremost it is an amazing thing the see Roto Grip and Shefanie teaming up for such a great cause like Big Brothers Big Sisters and donating money from every Duo that they sell! My home center every year puts on a big weekend event for Big Brothers Big Sisters so this definitely hit close to home for me. Now for the ball itself, my first time throwing it was for my reaction video and to say that I loved what I saw would be an understatement! The Duo definitely has given me some good old classic Roto Grip vibes! If you were a fan of the Wrecker or the Uproar then you should absolutely look into getting yourself a Duo because I personally think it shapes up exactly like those 2 balls did. It is definitely a tick stronger tho. It is also a perfect 1-2 punch for me with the Exotic Gem. Very similar shape wise except the Duo is a smidge weaker and a perfect ball down for when the Exotic is starting to lock up. Honestly tho if you haven’t drilled one yet then what are you waiting for!

  • Roto Grip Duo review by Chris Pollentier

    Posted by Chris Pollentier on Sep 11th 2023

    Roto Grip Duo Coverstock: MicroTrax Pearl Reactive Box Finish: Reacta Gloss Core: Mentor Core RG: 2.49, Diff: 0.046 (15 lbs) VLS Layout: 4 3/4 x 4 x 2 1/2 Dual Angle Layout: 45 x 4 3/4 x 40 PAP: 5 3/16” right x 5/8” up Rev rate: 400 rpm Average speed: 16.5 mph Location: Prairie Lanes, Sun Prairie, WI Pattern: Medium volume THS The Roto Grip Duo is the recent addition to the HP3 line that features the MicroTrax Pearl Reactive cover, same as on the Exotic Gem, and Mentor symmetric core that was partly inspired by the Dare Devil line of balls from a few years ago. All that goodness aside, what really makes this ball special is that it’s the first collaboration between “The Shafanie Duo” of PWBA stars Stephanie Johnson and Shannon O’Keeke, and is in support of a partnership with Big Brothers Big Sisters – with 5% of the sales from the Roto Grip Duo being donated to aid in the development and support of kiddos within the program!! This ball is a performer on the lanes as well. Because it has the same cover as the Exotic Gem, the Duo feels very much like a symmetrical version of the Exotic. The combination of the low RG, mid-differential core and strong coverstock makes this a strong but predictable pearl ball. Because the Duo comes out-of-box with the Reacta Gloss finish, I scuffed the surface lightly with a used 2000-grit Abralon pad like I have with many other balls that come polished just to scratch the surface a bit and knock some shine off. The Duo has thus far proven itself to be very versatile and I believe would be a great ball for most any league bowler as well. The Duo is clean enough to get through the front part of the lane to remain online, and it has a good strong backend reaction that isn’t so sharp that you can’t control it. In most cases, the Duo is the first ball out of my bag; and for league night it’s the only ball I need. If you’re looking for a ball that is cleaner with less overall hook than the Gem or Exotic Gem, but still something stronger than the Hyped and is versatile enough to thrown as the lanes transition – the Duo is it! Chris Pollentier Storm Products Pro Shop Staff #StormNation #SquadRG

  • Roto Grip Duo

    Posted by Mike LeViner on Sep 4th 2023

    Layout: 50 x 4 ½ x 35 The Duo has about as strong of a late midlane/backend reaction as you can have without it being classified as “skid flip”. The decent amount of midlane read that the Duo has both allows it to have a modicum of predictability and arciness, but overall, this thing can really fly in the back part of the lane! It has become my favorite ball for when strong backend is needed, especially on house shots. I've paired the Duo with the Summit to be a killer combination – the Summit shines on fresh or heavier oil, and the Duo comes out when the Summit starts to pick up too early or when I need to circle the lane more. The bright green and black color combo on this ball is really nice, also.

  • Roto Grip Duo

    Posted by Mike Craig on Aug 31st 2023

    I drilled up my Duo 5 x 4 x 3. This is my favorite layout for first out of the bag pearl balls. I hit the surface with a light 2000 to crack the shine and smooth the reaction out. I put the DUO up against the SUMMIT and pin under EXOTIC GEM. Just like you would expect, the DUO is dead in the middle of these two. A little later than the SUMMIT and quicker than the pin under EXOTIC. The DUO was at home for me on a middle pattern and flared around 4-5". I feel that the DUO will get play as a first ball out of the bag at places with some early friction burn in the fronts and also when the big solids are starting to lock up and lay flat down lane.

  • Duo

    Posted by Jeff Shadbolt on Aug 30th 2023

    15 Mph 340 RPM PAP 4 7/16> 5/8^ Right Handed Ave 220-230 Visit the YouTube channel for reviews! Duo 4 5/8 x 5 x 2 1/8 RG 2.49 DIFF .046 The Duo is a little earlier than my typical goto pearls but it offers me a more controllable motion downlane than most pearls do for me. I tend to enjoy this one a bit more on sport patterns than house shots but the Microtrax Pearl Cover on the Mentor Core definitely offers a different look in the bag. It could be very valuable at times.

  • Duo

    Posted by Todd B on Aug 30th 2023

    The new Roto Grip Duo is the result of a partnership with Big Brothers, Big Sisters. A portion of all sales of the Duo will go to this charity. The Duo features the Mentor core wrapped in the MicroTrax pearl reactive coverstock. The RG at 15lbs is 2.49 and the differential is .046. Drilled at 5x4x2 (pin above the bridge) the Duo reminds me of the original DareDevil, only smoother. The Reacta Gloss finish of the Duo provides effortless length through the front part of the lane and a very strong but predictable backend motion. For a pearl coverstock, this ball does not have that hockey stick shape backend but a much more arcing motion usually found in solid cover stocks. This allows the Duo to be a great choice on the tougher patterns when control is priority number one. The Duo won’t wow you with big backend hook or even overall hook, but it will control the pocket for you and provide excellent pin action. Get a great ball and help a great charity!!

  • Roto Grip Duo Ball Review

    Posted by Patrick Keiffer on Aug 26th 2023

    The Roto Grip Duo has a low RG value of 2.49 a medium differential of 0.046. Roto Grip used a 100% nanoparticle load which provides traction and response within the MicroTrrax pearl cover that displaces oil at its highest rate of any pearl covers offered today. In combination with a new Mentor core which was derived from the DareDevil series to give the clean, smooth motion through the front part of the lane and added forgiveness to the backend. The Optitrax cover which has been derived from years of testing and research to provide a more balanced oil displacement/absorption throughout the entire lane thus creating more consistency/predictability shot after shot in terms of skid distance, midlane traction, and response to friction down lane. Derived from the advancements of both the eTrax™ and eTrax™ PLUS solid materials the last couple years, we found this new direction of solid material that complements both of those without overlapping them. In addition, Roto Grip is proud to announce its partnership & support of Big Brothers Big Sisters. With the assistance of our very own mentoring duo, “The Shafanie Duo”, we will not only be supporting BBBS at various events across the country, but we will also be donating 5% of our sales to domestic distributors to aid in the development and support of children within the program. In comparison to the Roto Grip Exotic Gem, the Duo will be very close in ball motion due to using the same cover formula but what sets these two apart is the core strength. Which in turn will lead to the Duo going a pinch farther down the lane then the Exotic Gem but will have traction of the Exotic Gem. That traction component alone will allow you to use the Duo to be used in a variety of lane conditions. The Duo will provide you an option on the transition seen in Game 2 of league or in the Game 3 or 4 on tour depending on the lane condition of course. In the bag, will be the Gem, Exotic Gem, Xponent, Duo & Hustle RIP Please pick up a Roto Grip Duo at a Striking Results Proshop near you and please like and subscribe to my page Beyond the Arrows Ball reviews. Use my coupon code Patrick300 on your first purchase of a Bowlifi jersey and get $5.00 off.

  • Roto Grip Duo Ball Review by PJ Haggerty

    Posted by PJ Haggerty on Aug 23rd 2023

    The new Duo made by Roto Grip is the latest addition to the HP3 line and it’s impressive. With flashy, bright green shelf appeal, this ball also packs a punch. With an RG of 2.49 and a differential of .046, the Duo can be used by all types of players and on many different conditions. The Mentor Core is an upgrade from the old DareDevil that was made from Roto Grip years ago. The brains in Utah added a puck on the bottom of the core to enhance the motion down lane, and it definitely does that! I’ve drilled one Duo so far and really like it. I mapped it out as 5 1/4 x 4 1/2 x 2. This puts the pin above my bridge with a slight shift of the CG. It’s been a perfect compliment to my Gem, Exotic Gem, and TNT. Once those balls have done their job and I need something to get through the front but still dig, change direction, and still run over the 8-pin, the Duo is the ball I use. In most situations, I’m sliding left of 25 and curving it a good amount because that’s where I’ve seen the most success, but I’ve also seen the straighter players with lower rev rates use it to play farther right away from the traffic. If you need a ball that packs a punch, looks great going down lane, and can be usable for all types of styles and rev-rates, the Roto Grip Duo should be the next ball you drill.

  • Roto Grip Duo by Casey Murphy

    Posted by Casey Murphy on Aug 22nd 2023

    Orientation: Right Handed Rev Rate: 400 RPM Speed: 16-17 MPH PAP: 4 ½ over and ½ up Location: Enterprise Park Lanes, Springfield MO Pattern: High Volume THS VLS Layout: Layout 1: 5 x 4 x 2 ½ (pin above bridge) Layout 2: 4 ½ x 4 x 4 1/8 (pin below bridge) The Duo is a new sym pearl from Roto Grip. The is the strongest Pearl sym I’ve ever thrown. It features Micro Trax Pearl, which was on the Exotic Gem. It’s got a new core that doesn’t rev up super quick and has a medium amount of differential. This means the Duo keeps it’s axis and stores a good amount of energy. This means this ball hooks a ton. My only complaint is that I need a lot of oil to keep this ball online. On lighter volumes it will push you left.

  • Roto Grip Duo

    Posted by Brian Watson on Aug 16th 2023

    The Roto Grip Duo is the new ball in the HP3 line. Duo features the new low RG symmetric Mentor core. Which is wrapped with the MicroTrax Pearl cover, which is the same coverstock as the Exotic Gem. I drilled mine with a 4.5x4x2 layout. I tested the Duo on an 20+ year old Brunswick Pro Anvil lanes, on house shot and a couple medium patterns. The Duo gets through the fronts pretty good and has a lot midlane rolly shape for me and can get a little forward at times if there isn't enough oil. I can see me using the Duo on the fresh to blend out the backends. Plus I can use the Duo on the short patterns like Cheetah, to control the overall shape of the pattern. I think Duo is going to be good for the average league bowler as it can handle the miss lefts in the puddle and the miss rights to the dry and it doesn't over bounce. Duo is a good ball down from the Gem's or reality. Cleaner than a Phaze 2 or TNT. Overall the Duo is a strong symmetrical pearl that can be used by a variety of bowlers! Plus a percentage of domestic sales goes to Big Brother’s and Big Sisters. Thanks for Stephanie Johnson and Shannon O'Keefe! for the support of the Duo! Brian Watson Storm Pro Shop Staff PAP 3 7/8 up 1 1/4 RPM 400 MPH 16 TILT 16-17

  • DUO!!!

    Posted by Oliver Lawson on Aug 13th 2023

    The Duo is a a collaboration between Roto Grip, Big Brothers Big Sisters, and the Shafani Duo. The all new Mentor Core (named after those who are Big Brothers/Sisters) is wrapped in MicroTrax Pearl coverstock that has been featured as recent on the Exotic Gem. I drilled by Duo 4.75x4x4 2LS to help me get a consistent roll off the spot and see a strong smooth reaction. I have this same layout on my Fate and my Phase V, and I see 3 very different shapes of ball reaction. The Duo is considerably more forward off the spot and reads the midlane the earliest out of the three. The Fate is the strongest and has a much more continuous backend motion. The Phaze V goes easily 3-4ft more down lane before it starts to pick up and drive towards the pocket. The Duo is going to be filling the same spot in the bag as my Zen as it is quite possibly even more controllable. The Duo wants to pick up in the midlane a touch sooner than my Zen has in the past and is stronger on the backend. If you need something that is as good looking on the lane as it is off the lane, then the Duo is right for you. I will not often say that everyone needs a certain ball in their bag, but the Duo might just make that case for me. Visit your Local Storm VIP Proshop today to make a difference on and off the lanes with the Roto Grip Duo.

  • Overall Great Ball

    Posted by Evan Pitt on Aug 13th 2023

    The DUO is a ball that definitely has the capabilities to be apart of almost any game. Personally this ball seems to be more coverstock aggressive than core. It will read the mids very well, and come off the spot quiet hard. This type of ball motion will please the eyes of many bowlers, which if it pleases the eyes, you will throw the ball with more confidence. Who doesnt like more confidence in a ball?! I give it 4 stars because I am a big color guy, and these colors to me don't go well down the lane, but I know I'm on the unpopular opinion on that subject.

  • DUO!

    Posted by Josh Shoemaker on Aug 13th 2023

    The Duo features the Mentor core wrapped in the Micro Trax pearl. The Mentor core is a lower RG and medium differential core. The Micro Trax cover has most recently been featured on the Exotic Gem. This combo provides a perfect cleaner option that will fit right below your bigger symmetrical options and right above your Electrifys and IQ’s. 5% of all sales are also being donated to BBBS, so what’s not to love?? Review Video:

  • The Shafanie Duo

    Posted by Keith C on Aug 8th 2023

    Patterns: Length: 41' Volume: 25.79 Sport Pattern: Arsenic THS: 42' Coverstock: Micro-Trax Pearl Reactive Core: Mentor™ symmetric core Finish: Reacta Gloss Factory Finish RG: 2.49 Diff:0.046 Layout: 4 1/2 x 4 7/8 x 1 5/8 Duo: the ultimate control pearl when I need to ball down from my Zen. Early rolling core with less flare with the ability to turn the corner. I find the carry percentage is equal to my Zen as I have used on various THS conditions and the 41' Arsenic. I have not altered the cover as I like to test a ball based on the intended ball expectations and I have not been disappointed with my results. Bowling mostly on THS the Duo is very user friendly for all styles for it has that extra giddy up and go reaction typically liked by your everyday house bowler. CONTROLLABLE: I prefer this shape for both tournament and league to be the ultimate in versatility. Looking forward to its use after a year long injury recovery. So Visit your local VIP Pro Shop and get yourself a Duo aka “The Shafanie Duo” Likes: Controllable

  • Duo

    Posted by Nate Garcia on Jul 20th 2023

    Roto Grip’s newest symmetrical stronger pearl option, the Duo. The Duo has the Micro Trax pearl covered as seen on the Exotic Gem. The core is 2.49 RG and Diff of .046. With a strong coverstock and a high RG and DIFF, you can expect a cleaner option through the front part of the lane with plenty of backend reaction. I see myself throwing this ball right after my bench mark solid shapes when I still need a bigger cover but smaller core option to get around the lane. Not only should you get this ball because of how good it is on the lanes, but a percentage of domestic sales goes to Big Brother’s and Big Sisters. Huge shoutout to Storm and The Shaffanie Show for the collab and coming together to do something special. Get yours now at your local Storm VIP Pro shop.

  • Strong symmetrical pearl

    Posted by Garrett Richardson on Jul 12th 2023

    Duo The Roto Grip Duo with the Exotic Gem coverstock is such a great combination! This is my strongest pearl symmetrical ball in my bag. The layout is 4x4.5x2.5 which puts the pin up and a little to the left of my ring finger. Out the box the surface made the ball a lil too clean for me and at times too flippy with the reacta gloss polish so I used a 3000 abralon pad to knock off the shine and brought the ball to life. It has been a great ball for the fresh for me with the 3000 surface. On the Kegel Route 66 pattern it worked well on there. With that pattern you can’t get it out past 7-8 so to keep it more of a tighter line with a breakpoint around 10 11 down lane the Duo played perfectly! For my game this is probably the strongest symmetrical pearl from Roto Grip I have thrown. This will be a great ball for league bowlers and when you need something on a sport pattern for transition. Garrett Richardson Storm Amateur Staff

  • Reliable Motion

    Posted by Zack Newman on Jul 6th 2023

    The DUO is a reaction shape that was extremely welcome to my bag. It's an earlier shape that rolls throughout the entire body of the lane. I drilled mine 2x5 3/4x1 and left the box finish on the ball. It's a strong, even, continuous shape that is not at all violent at the breakpoint, but extremely predictable and reliable. I found that I didn't have much miss room to the left of my target down the lane, but lots of room and recovery to the right. The 2.49 RG gets it started and the .046 differential is what keeps it stable and predictable throughout the lane. Some people have compared it to the Zen but for me it's a little earlier and a little slower down the lane than the original Zen. I have the most success with it playing in or left of the track area and giving it some room to do it's thing. ALSO, 5% of every sale benefits Big Brothers Big Sisters, which is something that everyone can support!

  • Duo Review by Luke Rosdahl

    Posted by Luke Rosdahl on Jul 4th 2023

    The Duo features the new low RG symmetric Mentor core inspired by the Madcap core from the DareDevil series which comes in at a 2.49 RG and a .046 differential in 15 pounds, and is wrapped in the MicroTrax Pearl cover which comes out of the box with the Reacta Gloss factory surface. The Duo is a remarkably versatile ball at a virtually perfect strength for most league bowlers. It’s surprisingly clean and sharp considering it shares the cover from the Exotic Gem, and is somewhat directional. You can get it to stop and go forward if you want, or you can get it to be very continuous. It’s a nice blend between user friendly and forgiving and a very high amount of utility that makes the Duo a ball that gets better the better you are. The shape reminds me a lot of a Wrecker but stronger, somewhat tumbly, not quite chuggy, and somewhat hook/set.

  • A surprising ball!

    Posted by Brad Paynter on Jun 29th 2023

    The duo was a complete surprise to me. The combination of the low RG and relatively strong coverstock creates a smooth rolling pearl. I have found a lot of success on house shots and medium length sport shots. Also, the colors are amazing!

  • Duo

    Posted by Will Tefft on Jun 28th 2023

    Ball Specs: Roto Grip Duo Coverstock: Reacta Gloss MicroTrax™ Pearl Reactive Weight Block: Mentor™ Core (Symmetrical) Color: Black/Electric Green Review: When you purchase the Duo, you are not only getting a great ball but you are also supporting Big Brother, Big Sisters with a portion of sales going to help the charity. The pearl coverstock in one this ball is great for when the lanes start to break down and my Zen is just a little to strong for the reaction I am seeing. I tend to use this ball towards the second half of tournaments and during the second shift on league night. I love seeing the way this ball gets down the lane and has a strong backend motion through the pins. If the reaction doesn’t impress you the colors going down the lane will surely catch your eye and turn some heads. Make sure you pick yours up today and support a great cause in doing so. Will Tefft Roto Grip Pro Shop Staff Member #SquadRG

  • Duo Review by Kyle, Joel, & Dean Johnson

    Posted by Kyle, Joel, & Dean Johnson on Jun 22nd 2023

    Ball Specs: Roto Grip Duo Coverstock: Reacta Gloss MicroTrax™ Pearl Reactive Weight Block: Mentor™ Core (Symmetrical) Color: Black/Electric Green Review: Purchasing this ball means you will be supporting a great cause (Big brothers, Big Sisters) along with having a very unique piece of equipment in your bag. Wrapped in the same cover as the Exotic Gem, the new Mentor Core provides a much smoother and easily controllable shape. Our style: tweener, 350-375 revs, 16.5mph, layout of choice is 4x4x2 (pin is above bridge). This ball pairs well in our strong pearls along with our Zen and Exotic Gem. Although shaping much different, it is probably the most unique we have seen from Roto Grip in quite some time. This weight block really does pick up and continue through the pins while also providing max control. Other stronger pearls may require a bit more speed control while the Duo holds the line a bit longer. The shelf appeal is there and so is the technology behind this ball. Go out and support a great cause today! Kyle, Joel, & Dean Johnson Roto Grip Pro Shop Staffers #SquadRG

  • Roto Grip Duo By Chase Roloson

    Posted by Chase Roloson on Jun 16th 2023

    Roto Grip Duo Layout: 4 ½ x 4 x 3 Pin Up Bowlers PAP: 4 13/16” Over 11/16” Up Rev Rate 400 Rpm Unleash Dual Power and Control with the Roto Grip Duo Bowling Ball! I recently had the opportunity to test out the Roto Grip Duo bowling ball, and I must say, it's a fantastic addition to any bowler's arsenal. The Duo combines the perfect blend of power and control, offering a versatile and impressive performance on the lanes. First and foremost, the Duo features the unique Mentor Core, from its mushroom/bulb shape structure to the heavy density flip puck on bottom, (to give it extra giddy up) this part was constructed to deliver added forgiveness in the back part of the mid-lane and down lane where you need and want it most. To be perfectly honest, this latest addition to the HP3 family of cores was erected and developed from the inspiration of the Madcap™ Core numbers (DareDevil™ Series) from yesteryear. The result is a ball that offers an excellent combination of power and continuation down lane. The Mirco-Trax pearl reactive cover stock of the Roto Grip Duo further enhances its performance. This cover stock provides a perfect balance between traction and length, allowing the ball to read the lane with precision and maintain energy for a explosive entry into the pocket. The ball's strong mid-lane read and sharp backend reaction make it suitable for medium to medium heavy oil conditions. The Roto Grip DUO has been one of my favorite pieces in my bag in a long time and what is even better is roto grip donates 5% of sales to Big Brothers Big Sisters Foundation, a amazing reason to add this ball to your arsenal. Whether you're a competitive bowler seeking a versatile ball for tournaments or a casual player looking for a reliable and high-performance option, the Roto Grip Duo won't disappoint. Unleash great power with the Roto Grip Duo bowling ball! #stormnation #SquadRg #strikingworldwide #kosproshop