S6808-2RS Stainless Steel Sealed Ball Bearing 40mm x 52mm x 7mm S6808-2RS Bearing is double sealed, radial and deep groove ball bearing,bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, S6808-2RS bearings is sealed and self lubricated,S6808-2RS bearing is made of Stainless Steel, bearings is lubricated with grease.