Model B15-3HV is an E-equal or positive pressure mixer for light-duty brazing and welding with all fuel gases. This model has a mixer-to-tip tube thread size of 5/16 in. - 27. Its welding capacity is 1/2 in. (12.7mm) plate and it heats up to 60,000 BTU. Typical applications include metal art, maintenance, production brazing, etc. Conveniently vacuum-packed for point-of-purchase display.