Features: 100% brand new and high quality In the range of 620-850 degrees, and with silver -based solder, silver brazing copper and copper alloy, copper and stainless steel, can effectively dissolve the various metal oxides, fueling solder overflow. Function: 1. Melting, covering, isolating, preventing oxidation 2. Clean the surface of weld 3. Participation in flow brazing/puddle welding Cautions: 1. Clean oils, oxides and other contaminants of brazing components and solder surface . 2. Before welding, workpiece must be preheated to about 500 degrees and electrode coated with an appropriate amount of brazing flux . 3. After welding, cleaning welds, prevent corrosion of residues solder flux. 4. It should be stored in a dry place, against damp. Welding operation: 1. Mix the welding powder with pure water to paste. 2. Apply paste to the mouth of welding workpiece, or pre-heating the brazing and soldering alloy first. 3. Use the brazing and soldering alloy stick with the welding powder. The welding gap could not too big. It is normally 0.01-0.05mm. In the flame brazing, usually to use neutral welding. In the operation, should to avoid to use the flame to heat the brazing & soldering alloy and the welding powder. Specification: Net weight: 100g Color: White Quantity: 1 box Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 box x Soldering Paste(other accessories demo in the picture is not included.)