Do it 1 oz. Rosin 40% Tin, 60% Lead Solder is designed for general-purpose use, making it i for a variety of repair tasks such as fixing gutters, auto radiators, and filling metal seams. This solder reliable performance for these applications, but it is important to understand that it is not suitable for plumbing or electrical repairs. For those specific needs, other solder types with the appropriate compositions should be used to ensure safety and effectiveness. follow safety guidelines and select the correct solder for each job to achieve results and avoid any potential hazards. Model Number: 53035