Best Welds Smith Style 2-Pc Propane/Natural Gas Cutting Tips - SC-50 Series Two-piece general cutting tip for Propane-Oxygen or Natural Gas-Oxygen. Heavy preheat for hand and machine cutting. Fits torches Silver Star, Pipe Welders Special (00-5), Tuf-Tony (00-9). Fits machine torches SC770, SC771 (0-6), SC780A, SC781A, SC782A (00-9) Pack of 1