1.Long Operating Life 2.High Speed 3.Material:Bearing/Chrome/Carbon/Stainless steel 4.d:50mm ... Product Details MaterialChrome steel, Carbon steel, stainless steel, Bearing SteelSized: 50mm D:110mmT:55mmCagesteel cageSeals typeOPENNumber of ... mechanism, Machine shaft, Plastic and rubber machinery.AdvantageHigh speed, High lubrication grease technology, High precision, Low noise, Low cost, Long operaion ...