Miller® Smith® SC-40 Series Size 0 Two-Piece Propane/Natural Gas Cutting Tip cuts 3/8" thick metal and is perfect for general hand and machine cutting. Cutting tip requires 75 - 85 SCFH cutting oxygen flow rate, 38 SCFH preheat oxygen flow rate and 8 SCFH preheat fuel flow rate for cutting metals. Cutting tip is compatible with Smith SC as well as DG series cutting attachments, hand torches and machine torches.