... .It is made by tubes, hot roll steel and aluminium plate with the surface treatment of hot dip galvanizing.We make the ... fast, highly precise, and can produce sheet the metal parts with smooth surfaces.We are ISO9001:2000 certified. 1. Raw MaterialA ... ), CR (st12), Galvanized Steel, Stainless Steel (304, 310, 316, 439), Aluminium, Angle, Tube, Flat bar, etc.