SR168-2RS Stainless Steel Sealed Ball Bearing 1/4" x 3/8" x 1/8"SR168 2RS Rubber Sealed Ball Bearing 1 4" x 3 8" x 1 8" inch SR168 2RS Rubber Sealed Ball Bearing is double sealed, radial deep groove ball bearing, bearing is made from stainless steel and Stainless steel cage, SR168 2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, SR168 2RS bearing is sealed and self lubricated, SR168 2RS bearing is lubricated with grease. SR168 2RS Ball Bearing Deep Groove