6806-2RS Sealed Ball Bearing 30mm x 42mm x 7mm One Bearing 6806-2RS Sealed Ball Bearing is double sealed, radial and deep groove ball bearing,bearing is made of Chrome Steel with chrome steel balls and steel cage,6806-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,6806-2RS is sealed and self lubricated,the quality is set to EMQ (electric motor quality) to ensure high speed,6806-2RS bearings is lubricated with grease.