61910RS Bearing 50x72x12 Sealed6910RS Ball Bearing 50mm x 72mm x 12mm bearing 6910RS Ball Bearing 6910RS, the 6910RS bearings are made from high strength Chrome Steel, 6910RS bearing has Rubber seals to protect the bearing from dust or any possible contamination, 6910RS bearings are self lubricated bearings, 6910RS bearings are already greased, the 6910RS bearings can rotate up to 5,000 RPM Double sealed ball bearings 6910RS 6910RS Closures: Two Rubber Seals 6910RS Material: Chrome