OEM machining part 1,Material:steel, or as per customers' request 2 Surface Treatment:Yellow zinc ... .OEM service available 3.Materials: stainless steel,cast iron,pig iron,carbon steel,alloy steel,non-ferrous,grey iron,ductile cast iron ... wax process, soluble glass process , silicon process casting 5.Application: Industrial parts, Machinery parts, hardware, construction parts, valve/valve parts,train ...