... 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, ... iron etc.2. Process: die-cast/struck, stamping, Pressing,laser, printing, photo-etches are available.3.Plating: gold, silver, ...