Victor Equipment Multi-Flame Heating Nozzle 300 Series Model: MFA Part: 0323-0260 Size: 10 For use with 300FC Series Torch Handles. Multi-flame heating head for heat treating,straightening, & priming. Fuel Gas Usage - Acetylene, Hydrogen. Length: 17-1/2" Fuel Gas Usage: Acetylene or Hydrogen Approximate BTU Per Hour: 147,000 Manifolding of cylinders is essential for safe and efficient operation of large size heating tips. Warning: MANIFOLDING CYLINDERS: When required flows (cubic feet per hour- SCFH) exceed the recommneded withdrawal rate from one cylinder then additional cylinders must be manifolded to provide safe and efficient operation. Acetylene must not be withdrawn at more than 1/7 of the cylinder capacity )50 SCFH for a 350 cubic foot cylinder. Consult you gas supplier for manifolding instructions for the gases and cylinders supplied to you. Refer to Technical Data on Victor Equipment website.