Model 62-5F is a heavy-duty straight cutting torch designed to provide maximum performance using low-cost alternate fuel gases.* Harris' special âFâ injector can produce the hottest flame possible at the lowest gas pressures (4oz - 2 lbs.) making it the safest, most efficient design in the industry. Model 62-5F features a solid forged brass head, triangular tube design with brazed connections and a solid forged brass cutting lever providing strength, safety and a longer service life. It includes easily replaceable FlashguardÂŽ check valves that prevent the reverse flow of gases for added safety. It is ULÂŽ listed. Cuts up to 12" (304.8mm) plate. Alternate fuels include propylene or propane-based fuels and natural gas. NOT FOR USE WITH ACETYLENE.