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