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Lead Free Solder Wires are soldering materials for engineering, and electronic repairs. Lead-free tin-silver-copper alloy for simple applications. Tin-Silver-Copper (Sn-Ag-Cu, or "SAC") solders, based on the reduced melting point of the Sn-Ag-Cu ternary eutectic behavior (217 ˚C), which is below the 22/78 Sn-Ag (wt.%) eutectic of 221 °C and the 59/41 Sn-Cu eutectic of 227 °C Rosin Flux Rosin flux , used in electronics, where the corrosiveness of the vapors released when acid flux is heated would risk damaging delicate circuitry. Flux is a reducing agent designed to help reduce metal oxides at the points of contact to improve the electrical connection and mechanical strength Tin / Silver / Copper: 99% / 0.3% / 0.7%; Lead free Flux: 2% Weight: 100g (0.22lb) Diameter: 0.6 mm Melting point:215 °C - 220 °C (419°F - 428°F) Package Included 1 × Spool Solder Wire