Material: lead-free solder wire with rosin core, Sn99.3%, Cu0.7%; Wire diameter: 0.8mm. Rosin Flux: 2.2%. 2 rolls total weight 200g. Good quality welding wire: good quality welding performance to increase welding efficiency and quality. Good solder ability in both electrical conductivity and thermal conductivity. Working temperature: Solder wire melting point: 227/ 440.6. Working temperature: 320- 400. Flows well and heats evenly, easy to use. Environmental protection: Welding with less spatter, less smoke and easy to clean. Applications: Designed for electrical repairs, eg cell phones, radios, televisions, stereos, toys, motors, circuit boards, motherboards and other electronic devices. Features:< /p> With the solder wire winder, soldering can be completed faster, saving time and labor. Flows well and heats evenly, easy to use. Good solder ability in both electrical conductivity and thermal conductivity. Rosin is uniform and proper; insulation resistance, splash-free and non-corrosive. Widely used in electricity and electronics, soldering parts such as circuit boards, electronic devices and others.