Koike Aronson/Ransome Size 5 Divergent High Speed Tip cuts 2 1/2 - 3" thick plate, requires oxygen pressure of 45 PSI, preheat oxygen pressure of 45 PSI and fuel pressure of 2.1 PSI for cutting. Tip features a 14 inches per min cutting speed, 0.09" kerf width for a steady/safe cutting and is used for natural gas torches.