63801-2RS Sealed 12 X 21 X 7 Ball Bearing63801 2RS Sealed Ball Bearing 12 x 21 x 7 mm 63801 2RS Sealed Ball Bearing is radial, deep groove ball bearing, 63801 2RS bearing is made from Chrome Steel with chrome steel balls and steel cage, 63801 2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 63801 2RS bearings are sealed and self lubricated, the quality is set to EMQ (electric motor quality) to ensure high speed, 63801 2RS bearing is