Victor® Series 1 Size 7 GPN Natural Gas/PropaneCutting Tip with 0.34 kerf width and speed of 3/5 inches per min is suitable for machine torch. It requires 450/500 SCFH oxygen flow rate and 23/153 preheat oxygen flow rate for cutting metals. 10" Thick general-purpose cutting tip with 8/12 fuel PSIG is ideal for hand and machine torch cutting.