Contact us with your e-mail address for more info. Copper Wire scrap specification: Copper......................99. 90% (Min.) Lead.........................0.005% (Max.) Bismuth....................0.001% (Max.) Total impurities.........0.03% (Max.) Excluding Ag & O2 STANDARD CONFORMING TO: ISRI Code-1 Millberry clean, untinned, uncoated,unalloyed copper, pipes, sheets, wire and cable, not smaller than No. 16 B & S wire gauge, free of burnt wire.