Rosin Core Wire Solder •40/60 Alloy of 40% Tin and 60% Lead. •60/40 Alloy of 60% Tin and 40% Lead. •361°F - 460°F melting range for 40/60 Alloy. •361°F - 375°F melting range for 60/40 Alloy. •Can be used for electrical applications including wiring and other fine electronic work. •Contains lead. Not for use on drinking water lines.