These Genuine Yamaha Shock Bearing Kits come with all of the components needed to rebuild the shock bearings. Kits include all of the original equipment bearings, seals, O-rings, and collars your bike came with. Unlike some of the aftermarket companies that use a lower quality bearing, these bearings are O-ring-sealed to prevent intrusion of dirt, mud, and water and are made of top quality materials. So, if you don’t want to do the job again and in half the time that your original bearings lasted, then use these Genuine Yamaha kits.