S61902-2RS Stainless Steel Steel Ball Bearing, S61902-2RS is a popular size that could be used in many application that uses this size 15mm x 28mm x 7mm,S61902-2RS bearing has 2 built-in rubber seals to protect the bearing from dust or any possible contamination,S61902-2RS is a made of stainless steel, some bearing manufacturers call this bearing SS61902-2RS, S61902-2RS bearing is packed already with grease, S61902-2RS seals can be removed and reinstalled.