Oxidation Stabilized Bronze Powder is offered in ternary and quaternary grades like copper-tin-zinc, copper-tin- lead, copper-tin-zinc-lead, copper-tin-nickel, copper-tin-cobalt and copper-tin-iron. The Bronze Powder comes in a standard mesh size of -270 and 3 gm/cc apparent density range. The Bronze Powder is stabilized against oxidation and made from quality grade electrolytic copper. Oxidation Stabilized Bronze Powder has a normal shelf life that varies between 3 and 6 months.