... .different surface 5.OEM&ODM 1.Aluminum Die Casting is made of aluminum alloy,also can be produced according ... casting,forging,machining parts with different materials,such as aluminum alloy,,zinc alloy.3.our strong R&D ... your strict requirement.No matter you have a drawing or a samlple,we can give you the quotation ... and material test certificates are available upon requestus. cast aluminum piston