S6000-2RS Stainless Steel Sealed ABEC-3 Ball Bearing, S6000-2RS bearing is made of Stainless Steel with Ceramic Balls (Si3N4) and Stainless steel cage, S6000-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, S6000-2RS bearing is sealed and self lubricated,the quality is set to EMQ (ABEC-3 quality) to ensure a high speed, S6000-2RS bearing is lubricated with grease.