Copper coredEasy to operate, you can use city gas, liquefied petroleum gas, acetylene gas Stainless Steel Welding Rod for welding, without addition of flux, solder joints, high strength, good sealing, can brazed aluminum - aluminum, copper - aluminum. Refrigeration air conditioners, refrigerators, motors, transformers and other industries to achieve the ideal of copper aluminum welding materials, with conservation of resources, energy, environmental protection and many other advantages,