TIG Gas Lens Back Cap Collet Body Assorted Size Kit Fit QQ300 PTA DB SR WP 17 18 26 TIG Welding Torch 67pcs Fit QQ300 DB PTA SR WP CK 17 18 26 TIG Welding Torch 27pcs TIG Alumina Nozzle Gas Lens Ceramic Cup 18pcs TIG Collets and 5pcs TIG Collet Bodies 5pcs TIG Collets Lens and 5pcs L.G. TIG Gas Lens Collets Body 3pcs TIG back cap and 4pcs Gas Lens Gasket Cup Inset back insulator