... Engraving with colours. 5.Suitable for Promotional gifts Fine Copper.999 silver bullion Description:Production Type:Coin, medal, bullion, ... badge, insignia, etc. Material: pure gold, pure silver, copper, bronze, brass, zinc alloy, etc. Size: All sizes are ... Supply free design service according to your logos, words and pictures. Your designs are acceptable also. Process: die casting, engraved ...