Solder Wire, Form Flux-Cored Wire, Material Composition 97 Percent Tin, 3 Percent Copper, Wire Diameter 0.03125 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