Miller® Quickbraze™ Twin Flame Tip, 12200 BTU - Recommended for brazing copper pipe 5/8" - 1-3/8" (16 mm - 35 mm) in diameter. This tip can also be threaded on Versa-Torch™ adapters depending on fuel gas - adapter AT40 for acetylene and adapter AT41 for propane, natural gas or propylene.