Solder Wire Form Flux-Cored Wire Material Composition 97 Percent Tin 3 Percent Copper Wire Diameter 0.125 in Weight 1 lb Melting Temperature (Maximum) 445 Degrees F Flux Type Rosin Solder Series 97/3 Application Motors Repairs Speaker Wires Container Type Spool Flux Requirement Contains Flux Core Standards ASTM B-32