... . Remove all sharp edges. Powder coating. Fine quality. Competitive price. Aluminium metal box This is an electrical cabinet made by cold ... of 1.5mm.The surface is treated by black sand-blast powder coating.The processes involved are cutting,NCT punching,welding ... ), CR (st12), Galvanized Steel, Stainless Steel (304, 310, 316, 439), Aluminium, Angle, Tube, Flat bar, etc.