This bulk copper foil roll is 3 Mil (.003 inches) thick and twelve inches wide by one hundred and eighty feet long. It is manufactured to ASTM-B152 specifications, is annealed (soft and very malleable) with a smooth commercial finish, is 99.9% pure copper alloy 110, and has a thickness tolerance of +/- 5%. This roll can be used for various electrical applications including rf shielding, craft and art projects (scrap booking, paper crafts, punching, veneering etc...), do it yourself projects, manufacturing, and much more.