... widely used in advertisement, promotion, souvenirs, etc. Used material: copper, iron, aluminum, zinc alloy etc; Processing technics: hard enamel ... ; Surface plating: gold, silver, nickel, dark nickel, bronze, copper, pearl gold, pearl nickel, antique gold, antique bronze, antique ... according to your request: lapel pins,badge, medal, chest pin, cuff link, tie clip, memorizing coin, ID plate, label ...