S6902RS Sealed Stainless Steel Ball Bearing 15mm x 28mm x 7mm S6902RS Sealed Stainless Steel Ball Bearing, bearing is a popular size that could be used in many application that uses this size 15mm x 28mm x 7mm,S6902RS bearing has 2 built-in rubber seals to protect the bearing from dust or any possible contamination,S6902RS is a made of stainless steel, some bearing manufacturers call this bearing SSS6902RS, S6902RS bearings are packed already with grease, S6902RS seals can be removed and reinstalled.