Brazing Rods Phosphor Copper 5% Silver Nitrate Sticks Copper Solder Kit Alloys Flat Industry Welding Rods for Air-Conditioners, Refrigerators Pipe Gas and Freezers Storage HVAC(5% Silver Bcup-3)Material: The packaging includes 20PCS of copper drill rods Packaging: Sealed tube packaging is used, which can effectively reduce the occurrence of moisture and other events compared to other packaging. The lids at both ends can also be opened for easy storage and use. Advantages: Good fluidity during welding, able to flow into small spaces, and molten metal can flow into small gaps Performance: Our phosphor copper welding torch kit greatly improves