S6001-2RS Sealed Ball Bearing is double sealed, radial and deep groove ball bearing,bearing is made of Stainless Steel with Ceramic Balls (Si3N4) and Stainless steel cage, S6001-2RS is closed with rubber seals to protect the bearing from dust or any possible contamination,S6001-2RS bearing is sealed and self lubricated,the quality is set to EMQ (Premium ABEC-5 quality),S6001-2RS bearing is lubricated with grease.