Quantity and Size: 30 pcs 1.6 mm x 250 mm aluminum welding wire are included in the package. Material: Aluminum welding wire made of aluminum, with good ductility and conductivity, allowing you to achieve a smooth welding effect. Welding Effect: With internal powder, aluminum welding wires have a complete and smooth welding effect. It also has a low melting point, good weldability and corrosion resistance, high thermal conductivity, high electrical conductivity, and excellent machinability. Note: It is not suitable for welding cast iron. Wide Application: This type of aluminum welding wire can weld almost all white metals, including aluminum, aluminum alloy, cast aluminum, aluminum-magnesium alloy, etc. Aluminum welding wires have high strength, good forgeability, and corrosion resistance. No solder powder required: You do not need to use any other flux powder with low-temperature aluminum welding wire, as the solder core and coating act as the base. Very good aluminum welding wires for propane torches, convenient and easy to weld.