16 Oz/22 Mil (.0216") 24 gauge Copper Flashing. Alloy 110 (99.9% cu) Smooth Commercial Finish/Annealed (Dead Soft). 16 Ounce is often referred to as "roofing copper" as it is the preferred thickness for many roofing and flashing projects. It is also often used for various arts and craft projects, DIY projects, electrical applications, Research and Development and much more! Copper Sheets available in widths of 3", 6", 12", 18", 24" and 36". See our Thickness Guide for help determining the proper thickness for your project. Email us at info@basiccopper.com or call us at 1-618-684-2784 if you have any questions!