Size and IngredientLead-free rosin core solder wire; the diameter of the electric solder wire is 1.0mm; the metal wire solder wire weighs 100g. Sn/Cu: 99.3%/0.7%; Flux: 2%. Solder Wire has less smoke and rosin splash when soldering. Good Quality Solder WireFlows well and heats evenly, easy to use. Good soldering ability in both electrical conductivity and thermal conductivity. Excellent welding performance. Low Melting PointThe melting point of the soldering iron wire is 227 degrees Celsius (440.6 degrees Fahrenheit), flows well and heats evenly, easy to use. With the solder wire reel, soldering can be completed quickly. ApplicationThe tin lead solder wire is designed for DIY, home improvement, repairing cables, radios, TVs, VCRs, stereos, headphones, motors, toys, circuit boards and other electrical appliances. Lead Content: Lead-Free Lead-Free: Sn: 99.3%, Cu: 0.7% Rosin: Flux 2.0% Melting Point: 227 / 440 Wire Diameter: 1mm (0.039inches) Gross Weight: 100gram/0.22lb How to Solder: 1. Prepare the solder wire and electronic soldering iron. 2. Contact the soldering iron with the solder point. 3. Place the solder wire on the solder point when the solder is heated to the temperature to melt the solder. 4. When a certain amount of solder is melted, remove the solder wire. 5. Remove the electronic soldering iron at an angle of about 45 when the solder point has been completely wetted by the solder. Package includes:1 x 1mm Lead-Free Solder Wire