6805-2RS Sealed Ball Bearing 25 x 37 x 7 mm One Bearing 6805-2RS Sealed Ball Bearing is double sealed, radial and deep groove ball bearing, 6805-2RS bearings is sealed and self lubricated,the quality is set to EMQ (electric motor quality) to ensure high speed, 6805-2RS bearing is lubricated with grease, 6805-2RS is made of Chrome Steel with chrome steel balls and steel cage,bearing is closed with rubber seals to protect the bearing from dust or any possible contamination.