1654ZZ Sealed Ball Bearing 1 1/4" x 2 1/2" x 5/8" inch 1654ZZ Sealed radial Ball Bearing, bearing is made of Chrome Steel with chrome steel balls and steel cage, bearing is closed with Metal Shields to protect the bearing from dust or any possible contamination, 1654ZZ bearing is Shielded and self lubricated, bearing inner diameter is 1 1/4" inch, bearing outer diameter is 2 1/2" inch and bearing width is 5/8" inch, the quality is set to EMQ (electric motor quality) to ensure high speed up, bearing is lubricated with grease.