... competitive price , faet delivery time ,good service.6).Material stainless steel ,cold work steel ,Spring steel , martensitic steel,aluminum ,brass, bronze,copper, according to customer ... precision metal parts ;……Specifications of machining parts:(1) Material :Stainless Steel;Al;Alloy(2).High Tolerance :0.01mm(3).Certification : ... /OD Grinding 0.002Wire-Cutting 0.002 Stainless Steel Welding Parts