we have several types tungsten electrodes for tig welding, cerium-tungsten electrodes, thorium-tungsten electrodes, lanthanum tungsten electrodes, zirconium tungsten electrodes and others. 1）cerium-tungsten electrode has good starting arc performance, low melting rate, long welding life, it is mainly used for welding under the condition of low current. 2）thorium-tungsten electrode operates well even when overload with extra amperage, it is used for dc applications. 3）lanthanum tungsten electrode can be able to bear high current and have the lowest burn-lost rate, it is a popular tungsten electrodes in the circle of welding. 4）zirconium tungsten electrode has good corrosion resistance and good performance in ac welding. specification: 0.5-12.0mm diameter, l=150, 175mm or according to the customer’s request.