6808-2RS Sealed Ball Bearing 40mm x 52mm x 7mm 6808-2RS Bearing, categorized as slim section, double sealed, radial, deep groove ball bearing,6808-2RS bearing is made of Chrome Steel with chrome steel balls and steel cage,6808-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,6808-2RS bearing is sealed and self lubricated,the 6808-2RS inner diameter is 40mm, the 6808-2RS outer diameter is 52mm and the 6808-2RS width is 7mm, the quality is set to EMQ (electric motor quality) to ensure high speed,6808-2RS bearing is lubricated with grease.