S6203-2RS-12 Stainless Steel Sealed Ball Bearing 3/4" inch x 40mm x 12mm S6203-2RS-12 Stainless Steel, Sealed, radial, deep groove ball bearing, bearing is made of Stainless Steel and Stainless steel cage,S6203-2RS-12 bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,bearing is sealed and self lubricated,S6203-2RS-12 bearing is lubricated with grease.