* Material: tungsten , thorite, zirconium, cerium ,etc. * Diameter: 1-60mm * Length: 50-300mm Tungsten electrodes have excellent welding performance:1. Great arc starting capacity ... . they are mainly used for inert gas protection are welding.* Material: tungsten , thorite, zirconium, cerium ,etc.* Surface condition: Grinding, cleaning, electrolysis ...