Do it Solid 96 Percent Tin, 4 Percent Silver Lead- Solder, 1 lb. features a special silver-bearing lead- alloy that provides superior strength and excellent flow characteristics similar to traditional 50/50 solder. This solder remains solid at 425 degrees Fahrenheit and liquefies at 430 degrees, making it easy to cap and work with. It meets the requirements of the Federal Safe Drinking Water Act Amendments of 1986 (Public Law 99-339), ensuring safety and reliability. The solder is composed of 96% tin and 4% silver, with a melting range of 430 degrees Fahrenheit and a gauge of .117 inches. It comes in a convenient 1 lb. solid core package, for various soldering applications. Model Number: 53096