Features:
1) Material: brass, copper, iron, zinc alloy, aluminum
2) Color: soft enamel, silk printing, offset printing, imitation
hard enamel, fired hard cloisonn?
3) Facture: striking, etching, die casting, spin casting
4) Plate: gold, silver (or nickel), free nickel, copper, brass,
dual plates, antique finish, etc.
5) Surface option: shiny polish, matt plate, brush, sand grain