Koike Aronson/Ransome 402ST Size 1 Standard Acetylene Tip cuts 1/2" thick plate, requires oxygen pressure of 40 PSI, preheat oxygen pressure of 40 PSI and fuel pressure of 2.8 PSI for cutting. Tip features a 21 inches per min cutting speed, 0.07" kerf width for a steady/safe cutting and is used for IK-82 type torches.