... three cores of rosin, excellent wettability, fluidity, flux-cored solder wire Spec: Lead free: Sn-0.7Cu,Sn-0.7Cu ... , Sn55Pb45, Sn50Pb50, Sn45Pb55, Sn40Pb60, Sn35Pb65, Sn30Pb70, Sn25P75 flux-cored solder wire: Product NameAlloy compostion (WT %) Use TempZSLF01Sn: 99.5 Cu: ... assembly, Tongyong Tin Industry specially manufactures water-soluble tin wire, which is of good wettability, bright welting spot, ...