1). Stamped copper, iron, aluminum, etc. with hard enamel, imitation hard enamel, soft enamel, or without color; 2). Photo etched copper, iron, aluminum, stainless steel etc.; 3). Printing metal products; 4). Pewter products; 5). Zinc alloy products. 6). Stamped pin, printed badge, metal emblem, hat clip, coins, hat clip, money clip, tie clip, key chain, belt buckle, etc.