TIG Gas Lens Back Cap Long Alumina Nozzle Assorted Size Kit Fit QQ300 PTA DB SR WP 17 18 26 TIG Welding Torch 50pcs Fit QQ300 DB PTA SR WP CK 17 18 26 TIG Welding Torch 22pcs TIG Alumina Nozzle Gas Lens Ceramic Cup 12pcs TIG Collets and 5pcs TIG Collet Bodies 5pcs TIG Gas Lens 3pcs TIG back cap and 3pcs Gas Lens Gasket Cup Inset back insulator