Harris® D-85 all fuel gases E-equal positive pressure torch mixer with 23/64" - 26 thread connection is compatible with Model 85 torch handle, Model 8593 tip tube,Models 23A90 (0-10), 1390 (0-10), 1390-N (2-10) welding/brazing tips and Model J-16 (1and2), 1390 (BandH) heating tips. It has a welding capacity up to 1/2" and heating capacity up to 100,000 BTU. This medium duty mixer is used for metal fabrication and maintenance applications.