Smith Equipment SC60-4 Cutting Tip, 2-Piece, Series: SC60, Size: #4, Flow Rate: Oxygen: 315 scfh (Cutting), 58 scfh (Preheat), Fuel: 15 scfh Propylene (Preheat), Pressure: Propylene: 10 psig (Preheat), Oxygen: 54 psig Regulator/50 psig Torch (Cutting), 12 psig (Preheat), Flame Type: Medium Preheat, Gas Service: Propylene, Cutting Thickness: 4 Inch, Cutting Width: 1/8 Inch, Cutting Speed: 9 in./min.