Industrial & Scientific" /> Gas Service: Acetylene, Hydrogen Size: 4 Torch Handle Series: 100 Multi-flame heating head for heat treating, straightening and priming Length: 12.0'' (304.8 mm), Type: MFA-1 For use with 100FC Series torch handles Multi-flame heating head For heat treating, straightening and priming with acetylene and hydrogen Tip Size: 4 Approximate BTU Per Hour: 29,400