Description 1. It is made of high-purity, lead-free, environmentally friendly materials, with less impurities and sufficient proportions, and the soldering points on the surface of the tin wire are full. 2. The melting point is low, which reduces the thermal shock caused by welding on the components, high insulation resistance, stable performance and safe to use. 3. Good wettability and expandability, effectively prevent bridging and sharpen the phenomenon fast on tin; 4. Efficient ability of the deoxidation film to form an oxide film on the surface of the solder joint after soldering, slow down the oxidation of the solder joints and keep the solder joints bright; 5. Advanced flux formula, when welding, the flux spatters less, the smoke is small, no smell; 6. Less residue, rabbit cleaning and assembly process, good patency, neat winding, easy to use; 7. Suitable for engineering circuit welding, computer motherboard welding, mobile phone welding, aviation industrial circuit board welding, automatic soldering machine, DIY enthusiasts and other fields. Specifications: * Color: as shown * Material: copper-tin alloy * Wire diameter: 1.0 mm * Weight: 100g * Alloy composition (% by weight ): Sn99.3 Cu0.7 * Flux content: 2.2% 0.3% * Melting point range: 227 degrees Celsius * Halogen content: none * Density: 7.4 g / m3 * Working temperature: 380 20 degrees Celsius Scope of delivery: 1x solder wire