... be silver/gold plating 3.Style: Souvenir 4.custom design Double Sided Custom Coins pecifications:a) material: Brass,Zinc alloy,Stainless ... ) Process: Stamping,Die-cast, Injection, Photo etching,immitation hard enamel e)Logo: Soft enamel color, Silkscreen/offset printing, Laser, Engraved, Embossed ...