Type: WT20/WY20/WL20/WC20/WL15/WZ8/WR20/WES/WP Color: Gold, blue, green, red, gray, white, purple, dark blue Storage Box: 200*60mm Length: 150mm Diameter: 1.6 / 2.0 / 2.4 / 3.0 / 3.2mm Current: 10-400 (A) Features: << Application: Tungsten electrodes for TIG welding. << WT20: 2% thoriated tungsten electrodes (AWS classification EWTh-2) contain a minimum of 97.30% tungsten and 1.70 to 2.20% thorium. << WY20: contains 1.8%-2.2% Yttria which its electron function of 2.8eV-3.2eV. << WL20: 2.00% lanthanated tungsten electrodes (AWS classification EWLa-2.0) have excellent arc starting, low-burn-off rate, good arc stability and excellent re-ignition characteristics—many of the same advantages as ceriated electrodes. << WC20: 2% ceriated tungsten electrodes (AWS classification EWCe-2) contain a minimum of 97.30% tungsten and 1.80 to 2.20% cerium. << WL15: 1.5% lanthanated tungsten electrodes (AWS classification EWLa-1.5) have excellent arc starting, low-burn-off rate, good arc stability and excellent re-ignition characteristics—many of the same advantages as ceriated electrodes. << WZ8: The most commonly used in alternating current welding,which contains a small amount of Zirconium oxide. It’s electron work is 2.5eV-3.0eV << WR20: It is a non-radiation material. It is good to balance the electron mobility and evaporation rates, making tungsten electrodes to maximize their performances. << WES: It contains rare earth element, including 1.5% lanthanum oxide, 0.8% zirconia oxide and 0.8% yttrium oxide. << WP: Pure tungsten electrode is the earliest use of electrodes in TIG welding. It contains tungsten content minimum 99.5%, without other impurities. Package list: 10Pcs welding tungsten electrodes