... 3.surface: sand blasting or polishing 1.Products Name : die cast aluminium ledhousing 2.Material : aluminum alloy , zinc alloy , ... steel alloy3.process : die casting with machine4.surface treatment : sand-blasting,polishing ,powder ... machine CNC turning, EDM, Linear cutting machine, Die spotting machine(200T), Die casting machine, Lathe, Grinding machine; CMM, Material ...