To suit all 17/18/26 type TIG torches, these back caps are designed to put pressure on the collet holding the electrode whilst welding, in order to reduce the risk of the electrode shorting out. Features and Benefits Aids in preventing the tungsten electrode from shorting out Available in two sizes to suit your needs Simple yet effective insulator to hold the electrode in place whilst welding Typical Applications TIG welding Notes Please note images of products are for representation purposes only. Whilst every care is taken to provide accurate images of products, actual products may differ slightly