Lead Free No-Clean Flux Core Silver Solder, SAC305 .031-Inch, 2 Ounce Spool Excellent quality general purpose solder No-Clean Flux Core For use on Circuit Boards and flux reside is non-corrosive Melts at 430 Degrees F(221 Degrees C) Contains: 96.5%Sn / 3% Ag / 0.5%Cu