Quality MaterialThe solder wire is made of high quality electrolytic tin, free of impurities, making it safe and reliable for long-term use. It produces little resin splash during the Soldering Tin Reel.High PerformanceComposed of 63% tin (Sn) and 37% copper (Cu), this solder wire offers excellent performance. It helps increase soldering speed while reducing the thermal impact on components, resulting in significantly reduced soldering time.Low Melting PointThis solder wire has a low melting point, between 183 and 245 C. It is versatile, low-corrosive and offers exceptional soldering brightness while preserving electronic components.Four Spools of Solder WireOur solder wire set includes four 1mm spools (20g/30g/50g/100g) to meet your various soldering needs. These spools are designed for long-term use.Versatile ApplicationsOur solder wire with built-in flux is ideal for soldering. It is specially designed for electrical DIY work, repairing electrical cables and wires, as well as maintaining equipment such as air conditioning.