1. Brand new and .2. Made of silver, copper, aluminum alloy materials, more in use.3. The combination of 4 different specifications makes it more practical to use.4. The wire is flexible to change shape, so that it has a wide-range in application.5. Great welding rods for jewelry making.Specification:Features:1. Brand new and .2. Made of silver, copper, aluminum alloy materials, more in use.3. The combination of 4 different specifications makes it more practical to use.4. The wire is flexible to change shape, so that it has a wide-range in application.5. Great welding rods for jewelry making.Specification:Condition: Brand NewMaterial: Silver, Copper, Aluminum Alloy MaterialsColor: As Pictures ShownDiameter: 0.5mm, 0.7mm, 1.0mm, 1.5mmPackage List:4 * Welding RodsNote:1. The melting temperature of the welding rod is about 700 degrees Celsius, and the melting time is slightly different depending on the thickness of the welding rod. 2. The color of the soldering rod is yellow because it contains copper.