1、The pure tungsten electrode contains at least 99.5% tungsten with excellent performance in conductivity and durability. 2、Non radioactive tungsten electrode without contamination. 3、With low burn-off rate and good arc stability. 4、Provide 9 sizes of pure tungsten electrode to meet your different demands. 5、Mainly used for AC welding of nickel alloy, Mg aluminum and their alloy. Pure tungsten electrode is the  most earliest used electrode in TIG welding, which features low resistance, good electricity conductivity and small thermal expansion. It is usually used for the AC welding. Features: 1. The pure tungsten electrode contains at least 99.5% tungsten with excellent performance in conductivity and durability. 2. Non radioactive tungsten electrode without contamination. 3. With low burn-off rate and good arc stability. 4. Provide 9 sizes of pure tungsten electrode to meet your different demands. 5. Mainly used for AC welding of nickel alloy, Mg aluminum and their alloy. Specification: Model: WP Material: Tungsten Quantity: 10pcs Welding Current: 250-400A Tip Color: Green Optional Size: 1.0*150mm / 0.04*5.91in, 1.6*150mm / 0.06*5.91in, 2.0*150mm / 0.08*5.91in, 2.4*150mm / 0.09*5.91in, 3.2*150mm / 0.13*5.91in, 1.0*175mm / 0.04*6.89in, 1.6*175mm / 0.06*6.89in, 2.0*175mm / 0.08*6.89in, 2.4*175mm / 0.09*6.89in, 3.2*175mm / 0.13*6.89in Weight: Approx. 50~280g / 1.8~9.9oz Package list: 10 * Pure Tungsten Electrodes Note: Please allow slight error due to manual measurement. Thanks for your understanding.