Victor Equipment Multi-Flame Heating Nozzle 100 Series Model: MFA-1Size: 8Part #: 0324-0111 Multi-flame heating head for heat treating, straightening, & priming. Fuel Gas: Acetylene or Hydrogen Length: 12" Approximate BTU Per Hour: 117,600 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 Acetylene must not be withdrawn at more than 1/7 of the cylinder capacity )50 SCFH for a 350 cubic foot cylinder.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.