S6805-2RS Stainless Steel Sealed ABEC-5 Ball Bearing With Si3N4 Ceramic Balls 25mm x 37mm x 7mm S6805-2RS Stainless Steel Sealed ABEC-5 Ball Bearing, S6805-2RS bearing is made of Stainless Steel with Ceramic Balls (Si3N4) and Stainless steel cage, S6805-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, S6805-2RS bearing is sealed and self lubricated,the quality is set to EMQ (ABEC-5 quality) to ensure a high speed, S6805-2RS bearing is lubricated with grease.