Cutting Tip 2 Piece O-FS Size 31 Gas Service MAPP Flame Type Medium to Heavy Preheat Steel Thickness 8 In. Fuel Pressure 30 to 43 psi Oxygen Pressure 60 to 85 psi MAPP Gas Silver Solder No MAPP Gas Silver Braze No MAPP Gas Soft Solder No Propane Gas Silver Solder No Propane Gas Silver Braze No Propane Gas Soft Solder No Silver Solder Tube No Soft Solder Tube Cap. No For Use With Oxweld Products