... after-sale service SpecificationAccording to your requirement.MaterialStainless steel, brass, copper, aluminum, carbon steel, alloy steel etc.Surface TreatmentZn-plating, Ni ... -plating, Cr-plating, Tin-plating, copper-plating, the wreath oxygen resin spraying, the heat disposing, hot ... free to contact with us : stainless steel shaft and metal bar roller