210 SZ Sealed 50x90x20 Ball Bearing210SZ Sealed Ball Bearing 50mm x 90mm x 20mm 210SZ Sealed Ball Bearing, 210SZ bearing is made from Chrome Steel, 210SZ bearing is closed with rubber seals to protect the bearing from dust or any possible contamination, 210SZ bearing is a self lubricated bearings, 210SZ bearing is already greased. 210SZ ball bearing Deep Groove Ball Bearing Closures: Rubber Sealed Material: Chrome Steel Size: 50mm x 90mm x 20mm Inner Diameter: 50mm Outer Diameter: 90mm