A-BF Lead Free Rosin Core Solder Wire Sn99.3 Cu0.7 for Welding Electrical Soldering DIY Repair Working 0.0315 Inches(0.8mm) 0.22lbs(100g) LEAD FREE: Sn:99.3%, Cu:0.7% Flux:2%.Very excellent welding performance. HIGH QUALITY: Rosin core soldering wire.Good solder ability.Diameter 0.8mm fit for most of soldering work. EASY TO USE: Lower melting point: 227 degrees Celsius/ 441 degrees Fahrenheit.Flows well and heats evenly. ENVIRONMENTAL FRIENDLY: Welding with less spatter, less smoke, easy to smell.Make soldering more efficient. MULTI PURPOSE: DIY soldering, after-sales service engineers, school work, home improvement, repairation of circuit board / cable / TV / radio / toys.