Copper Sheet 3 Mil (.003 inches thick) Copper Alloy 110 (99.9% cu) Smooth Commercial Finish/Annealed (Dead Soft). Premium Copper Sheets for Crafts and Art Projects, Embossing, Manufacturing, Electrical Applications, Research and Development, Do It Yourself Projects, and Much More! See our Thickness Guide for help determining the proper thickness for your project. Please don't hesitate to contact us via email at or try our "live chat" feature for immediate assistance!