This copper sheet is 8 Mil (.008 inches) thick and eighteen inches wide by forty-one feet long. It is manufactured to ASTM-B152 specifications, is annealed (dead soft and very malleable) with a smooth commercial finish, and is 99.9% pure copper alloy 110. This roll can be used for various craft and art projects (embossing, birdhouse roofs, punching, veneering etc...), do it yourself projects, electrical applications, manufacturing, and much more! See our Thickness Guide for a video description of 8 mil. If you have any questions, please don't hesitate to contact us via phone at 252-491-2812, via email at email@example.com or through our "live chat" and we will be happy to discuss your project!