... 3.zinc plated,black,etc 4.flat,pan, etc. cnc machining part 1.Surface Finish: annealing, natural anodization, heat treatment, polishing, nickel plating ... ourself to smile to each customer1)Details: Product name cnc machining part Material1.Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS4202.Steel ...