... etc. 2.Material: 45# Steel or others 3.Chromeplate or zinc coating Brake piston 4V4852 and 7K4937:1.TYPE: 4V4852, ... 7K4937, and other types2.Material: 45# Steel or others3.Strict ... design and testing4.Chromeplate or zinc coating5.Delivery on timeIn addation, we can offer brake pad, brake shoe, brake lining, brake ...