Give your stained glass projects the support they need with Strongline Reinforcement. This ultra-thin coppered steel strip is designed to fit snugly inside most standard lead channels, providing discreet but powerful reinforcement. Measuring just 0.020" thick, it's ideal for use with copper foil or leaded glass, and can be applied to one or both sides of your project for added stability. The 25-foot dispenser makes it easy to use and store, whether you're reinforcing panels or prepping pieces for transport.