RLS4-2RS Sealed Bearing 1/2 X1 5/16 X 3/8"RLS4 2RS Sealed Ball Bearing 1 2" X1 5 16" X 3 8" One Bearing RLS4 2RS Sealed Ball Bearing is double sealed, radial and deep groove ball bearing,bearing is made from Chrome Steel with chrome steel balls and steel cage,RLS4 2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,bearing is sealed and self lubricated,the quality is set to EMQ (electric motor quality) to ensure high speed,RLS4 2RS bearing is