★ This is a set of 10 Mochedo Factory frequently rotated 520 bearings. Replace the bearing included with the aluminum roller and it will spin well. You can get a continuous roll of "sheroo" ★✅Size: Outer diameter 0.2 inch (5 mm) / Inner diameter 0.08 inch (2 mm) / Width 0.1 inch (2.5 mm) / Roller bearings frequently rotate the 520 bearings so that you can see how much changes it is. Please check out the Mochedo Factory Channel videos for your convenience. You wont see what you need! ★✅Regular bearings have oil sealed but the frequently spinned 520 bearings are not sealed in oil. This is an oil-less dry type. It is the same as it is degreased from the beginning, eliminating the hassle of degreasing after purchase. ★✅ Do you have a roller that couldnt spinn? No more throwing out the rollers that have lost turning. By replacing the 520 bearing on your previous roller with the Mochedo Factorys most popular 520 bearings you can transform your roller into a more comfortable rolling roller than ever before. You dont want to throw away your old roller. Give them a new look. ★✅ Please use the Mochedo Factory Bearing Changer II when replacing roller bearings. If you remove or install the bearing forcefully, it may cause damage to the roller or bearing. With the Mochedo Factory Bearing Changer II, you can easily remove and remove roller bearings at any time. ★ Note: There may be individual differences in rotation and rotation. Please understand that it will shorten the lifespan of the product as a replacement for smooth rotation. If you want to extend the life of the product, you can apply a small amount of smooth oil with low resistance. Too much oil is resistant ★JAN:4573425580410