Description of Two sides antique gold enamel challenge coins:1. Materials: copper, zinc alloy, iron, aluminum. 2. Process: stamping, die casting, corrosion, color in, soft enamel, silk screen printing, sticker, laser. 3. Surface treatment: gold plating, matt gold plating, antique gold plating, silver plating, matt silver plating, antique silver plating, nickel plating, matt nickel plating, black nickel plating, bronze/brass plating, antique bronze/brass plating, copper plating, antique copper plating. 4. Size: A variety of sizes are available. 5. Epoxy are optional. 6. Accessories are available. 7. Color: according to international color card and Pantone color card. 8. Packaging: 1PCS/OPP bags, the appropriate number into the middle bag, and finally into the carton.