The HVAC tools and equipment are used for brazing copper in motors, air-conditioners, meters, and refrigeration industries. Brazing rods can braze some pipes, the small copper braze job, and the art project. The low-melt solder is widely used for refrigerator copper tubes, air conditioner copper tube welding, copper product welding, DIY craft drift punches, and knife handle latches. 1. The flux is evenly distributed, and has good continuity; 2. The welding stick not get tangled during welding and not block the conduit; 3. There is less spatter and smog during welding, and the solder joints are firm; 4. Good fluidity during welding, strong caulking, and can flow into small spaces. 1. Clean the of the copper material to be welded; 2. Insert the stick into the welding or pen, and adjust the welding current and power as needed; 3. Contact the welding stick with the copper material to be welded to melt the contact; 4. Remove welding slag and remaining stick after cooling. For manual measurement, please allow slight errors in size. Before using these brazing rods, please keep proper ventilation, adhere to recommended temperature ranges, and wear appropriate safety gear during use. Color: As shown Material: Copper Package Contents: 12*pcs Copper Brazing Rods Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.