63/37 solder wire is the best comprehensive solder wire in the leaded solder wire series.It is a solder wire with the best gloss among leaded solder products developed by the International Welding Research Institute according to the golden ratio of solder and lead. Before lead-free solder was not promoted, it was the most commonly used one in all electronic welding in the worldSolder products have the following advantages such as low content of impurities in the solder wire, low melting point (183 ° C), bright and full solder joints, strong fatigue resistance, low smoke, and low slag. ◆ Good solderability and short wetting time. ◆ The rosin in the line is evenly distributed, does not splash, and has good continuity. ◆ No foul odor, less smoke, no volatile gases that are harmful to health.