RLS7-2RS Sealed Ball Bearing 7/8" x 2" x 9/16" inch RLS7-2RS Bearing is double sealed, radial, deep groove ball bearing,RLS7-2RS bearing is made of Chrome Steel with chrome steel balls and steel cage,RLS7-2RS bearing is closed with rubber seals to protect the bearing from dust or any possible contamination,RLS7-2RS bearings are sealed and self lubricated,the quality is set to EMQ (electric motor quality) to ensure high speed,RLS7-2RS bearing is lubricated with grease.