machining bushing: Material: stainless steel,alloy steel and carbon steel Technical process: machining+drilling+phosphated Specifications Name:Machining partsMaterial:stainless steel,alloy steel and carbon steel etc.Machining process:CNC machining, milling, turning, drilling, planning, welding, laser cuttingSurface treatment:Polishing, phosphating/chrome/zinc/nickel plating, power coating, ...