Solder Wire Form Flux-Cored Wire Material Composition 97 Percent Tin 3 Percent Copper Wire Diameter 0.1 in Weight 1 lb Melting Temperature (Maximum) 445 Degrees F Flux Type Rosin Solder Series 97/3 Application Appliances Motors Speaker Wire Wiring Container Type Spool Flux Requirement Contains Flux Core Standards ASTM B-32