CK Worldwide / Weldmonger® Large Diameter Gas Lens Kit (for 17,18,26 Style Torches)Now comes with Tungsten, and is setup for 3 32, 1 8, or 5 32! Works with 17, 18, 26, CS300, CS410 and CK 3 Series TIG torches. This Large Diameter Gas Lens kit is especially popular with pipe welders and works great for: Walking the cup on pipe Socket welds both Stainless and Carbon Stainless Sanitary tubing for Food and Beverage Aluminum tread plate Weld Stainless Steel and Nickel Alloys like Inconel and Hastelloy with less Discoloration and less