... copper,bronze, gold, silver..... Specifications defence threat reduction agency award medal 1.Material:zinc alloy or copper,brass,antique copper ... ,bronze, gold, silver.. 2.Logodefence threat reduction agency award medal Description:1. Material: steel, brass, zinc alloy, copper, ... .Size: 35mm,40mm,45mm,55mm,60mm,70mm diameter etc (custom size is accepted)6.Thickness: normally 3mm,3,5mm,4mm ...