... Sn50Pb50, Sn45Pb55, Sn40Pb60, Sn35Pb65, Sn30Pb70, Sn25P75 flux-cored solder wire: Product NameAlloy compostion (WT %) Use TempZSLF01Sn: 99.5 Cu: ... cleanness, nice appearance, high insulation resistance after welding, low ion pollution, and little residue of PCB plate after welding, ... resistance after cleaning, nice, reliable, no halogen or ion pollution, and easy to clean. And it ensures sufficient ...