1) Materials:Brass, zinc alloy, stainless steel, iron, aluminum2) Plating:Gold, anti-gold, silver, anti-silver, nickel, anti-nickel, black Nickel, brass, anti-brass, copper, anti-copper, dyed black3) Processing:Stamped, photo etching, injection4) Logo:Offset, silk print, coloring, soft enamel, laser printing...