Fit QQ300 DB PTA 17 18 26 TIG Welding Torch This Studdy Gas lens & Collet kits fits all 17 & 26 series cooled torches and 18 series water cooled torches, including the PTA-17, PTA-18 and PTA-26 torches, DB17, DB18 and DB 26 torches, along with the -17, -18 and -26 torches. - product name 1pcs 0.040 inch & 1.0mm 17GL040 Stubby Gas Lens 1pcs 1/16 inch & 1.6mm 17GL116 Stubby Gas Lens 1pcs 3/32 inch & 2.4mm 17GL332 Stubby Gas Lens 1pcs 1/8 inch & 3.2mm 17GL18 Stubby Gas Lens 1pcs 0.040 inch & 1.0mm 10N22S Collet 1pcs 1/16 inch & 1.6mm 10N23S Collet 1pcs 3/32 inch & 2.4mm 10N24S Collet 1pcs 1/8 inch & 3.2mm 10N25S Collet 1pcs 4# Ref NO: 53N58 D6.5 x 25.50 mm 1pcs 5# Ref NO: 53N59 D8.0 x 25.50 mm 1pcs 6# Ref NO: 53N60 D9.5 x 25.50 mm 1pcs 7# Ref NO: 53N61 D11.0 x 25.50 mm 1pcs 8# Ref NO: 53N61S D12.50 x 25.50 mm 1pcs 57Y04 short back cap 1pcs 57Y03 middle back cap 1pcs 17GLG20 Gas len insulator Color: red + black material: metal Package Contents: 5 * TIG Alumina Nozzle Cup 4 * TIG Collets 4 * TIG Gas Lens 2 * TIG back cap 1 * Cup Gasket Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.