Cutting Tip Compatible Fuel Type Propane Tip Series 107 Tip Size 4 Tip Design Two Piece Minimum Cutting Thickness 40 in Maximum Cutting Thickness 50 in Compatible Manufacturer Koike Flame Type Medium Preheat Kerf Width 0.11 in Maximum Cutting Speed 12.5 in/min Pressure Rating (Fuel) 2.1 psig Pressure Rating (Oxygen) 45 psi