This copper foil roll is 5 Mil (.005 inches) thick and three inches wide by two hundred feet long. It is manufactured to ASTM-B152 specifications, is annealed (dead soft and very malleable), and is 99.9% pure copper alloy 110. This roll can be used for various electrical applications including rf shielding, craft and art projects (embossing, repousse, scrap booking, paper crafts, punching, veneering etc...), do it yourself projects, manufacturing, and much more.