GOCHANGE 46Pcs TIG Welding Torch Gas Lens Kit WP-17 WP-18 WP-26 WL20 Lanthanated Tungsten The lanthanated tungsten electrode became very popular in the circle of welding in the word soon after it was developed because of its good welding performance. The electric conductivity of lanthanated tungsten electrode is most closed to that of 2% thoriated tungsten electrode at either AC or DC and do not have to make any welding program changes. The radioactivity from thoriated tungsten can thuscurrent an Region free and easy to use; Can be used of WP-17 WP-18 WP-26 TIG Welding Torch. The Brand of Machine would be Rilon, Riland, Jasic, Mitech, Chiry, UNT, Krypton, Longetivity, Berlan and so on. This kit fits all 17 26 series air cooled welding torches and 18 series water cooled torches, Lincoln PTA-17 PTA-17V PTA-26 PTA-26V PTW-18 Tig Welding Torches, Miller Diamondback DB17 DB17V DB26 DB26V DB 18 Tig Welding torches.