Uniweld GPNA-1 Ameriflame Cutting Tip for Use with Oxygen and Natural Gas/Propane(General Purpose/Machine Cutting) GPNA-00 Cuts Up To 1/4-Inch Steel Using 20/25 PSI Oxygen and 5 PSI Fuel, GPNA-0 Cuts Up To 1/2-Inch Steel Using 30/35 PSI Oxygen and 5 PSI Fuel GPNA-1 Cuts Up To 3/4-Inch Steel Using 30/35 PSI Oxygen and 6 PSI Fuel, GPNA-2 Cuts Up To 1-1/2-Inch Steel Using 40/45 PSI Oxygen and 9 PSI Fuel GPNA-3 Cuts Up To 2-1/2-Inch Steel Using 45/50 PSI Oxygen and 10 PSI Fuel, GPNA-4 Cuts Up To 3-Inch Steel Using 45/50 PSI Oxygen and 12 PSI Fuel GPNA-5 Cuts Up To 5-Inch Steel Using 50/55 PSI Oxygen and 12 PSI Fuel