63/37 Tin Lead Melt Rosin Core Flux 1.8% Soldering Solder Wire 50g (0.6MM) 63/37 rosin core solder Flux 1.8% Suitable for instrumentation, mobile phone or electronic products and other high-end welding require Material: Tin Wire Wire diameter: approx. 0.5mm, 0.6mm, 0.8mm, 1mm