Alpha Metals 0.9 oz. 0.062-Diameter Leaded Electrical Solder Spool is a leaded rosin flux core solder with a 40% tin and 60% lead alloy ratio. It has a melting temperature of 460 degrees Fahrenheit and is not water-soluble. This solder is ideal for electrical applications such as soldering wires, terminals, and components. It is also suitable for use in plumbing, jewelry making, and other metalworking applications.