1) Material: Aluminum, brass, different kinds of stainless steel, iron etc. 2) Advanced measuring & testing equipment projecting apparatus, roughness tester, hardness tester, concentricity tester etc. 3) Parts are produced according to customers' drawing or sample. 4) All kinds of surface treatments are available: polishing, nickel plating, zinc plating, chrome plating. sales dot sinotechmac dot com