Miller® Smith® SC-50 Series Size 0 Two-Piece Propane/Natural Gas Cutting Tip cuts 1/4-3/8" thick metal and is perfect for general hand and machine cutting. Heavy preheat cutting tip requires 40 - 50 SCFH cutting oxygen flow rate, 62 SCFH preheat oxygen flow rate and 15 - 16 SCFH preheat propane flow rate for cutting metals. Tip requires 105 - 135 SCFH oxygen flow rate, 70 SCFH preheat oxygen flow rate and 40 SCFH preheat natural gas flow rate for cutting metals. Cutting tip is compatible with Smith SC200/DG200 series attachments, SC/DG series hand torches, two-hose machine torches and three-hose machine torch.