RMS10-2RS Sealed Ball Bearing 1-1/4" x 3-1/8" x 7/8"RMS10 2RS Sealed Ball Bearing 1 1 4" x 3 1 8" x 7 8" inch one Bearing RMS10 2RS Sealed Ball Bearing is double sealed, radial and deep groove ball bearing, RMS10 2RS is made from 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, RMS10 2RS bearing is sealed and self lubricated,the quality is set to EMQ (electric motor quality) to ensure high speed,