Cutting Tip, 6290-NX, Size 4, Gas Service Propane, Cuts To (In.) 3-6 In., Fuel Pressure 4 oz. to 2 psi, Steel Thickness 3 In. to 6 In., Oxygen Pressure 50 to 75 psi, 1 Piece, Includes One Alternate Fuel Cutting Tip for Oxy-Propane/Natural Gas, Size 4, For Use With Harris Model 62-5F, low pressure In.F In. injector Torches.