Oatey 53177 95/5 Lead Free Rosin Core Wire Solder Lead Free Alloy of 95% Tin and 5% Antimony. 450 F - 464 F melting range. Designed for electrical/electronic work. Rosin flux is contained within the core. Lead Free Alloy of 95-Percent Tin and 5-Percent Antimony 450-DegreeF - 464-DegreeF melting range. Designed for electrical/electronic work Rosin flux is contained within the core