SRA Soldering Products WBNCSAC15 Lead Free No-Clean Flux Core Silver Solder, SAC 305 .015-Inch , 1-Pound Spool Excellent quality general purpose solder No-Clean Flux Core For use on Circuit Boards and flux reside is non-corrosive Melts at 430DegreeF(221DegreeC) Contains: 96.5%Sn / 3% Ag / 0.5%Cu and Melts at 423-428DegreeF.(217-220DegreeC)