No Clean Lead Free Solder 0.032" diameter, 1/4 Pound Spool Eutectic alloy (liquidus = solidus temperature) Alloy exceeds J-STD-006C and meets ASTM B 32 purity requirements Flux meets J-STD-004B The resin spreads like rosin-activated flux Virtually non-splattering Non-corrosive Non-conductive Halide free.