Uniweld 3-101A-2 Ameriflame Cutting Tip for Use with Oxygen and Acetylene (General Purpose Cutting) 3-101A-00 Cuts Up To 1/4-Inch Steel Using 20/25 PSI Oxygen and 5 PSI Acetylene, 3-101A-0 Cuts Up To 1/2-Inch Steel Using 30/35 PSI Oxygen and 5 PSI Acetylene 3-101A-1 Cuts Up To 3/4-Inch Steel Using 30/35 PSI Oxygen and 5 PSI Acetylene, 3-101A-2 Cuts Up To 1-1/2-Inch Steel Using 40/45 PSI Oxygen and 7 PSI Acetylene 3-101A-3 Cuts Up To 2-1/2-Inch Steel Using 45/50 PSI Oxygen and 10 PSI Acetylene, 3-101A-4 Cuts Up To 3-Inch Steel Using 40/50 PSI Oxygen and 10 PSI Acetylene