Model V-W is a heavy-duty Victor® compatible “E” equal or positive pressure mixer for welding, brazing or light heating for use with all fuel gases. The mixer to tip or tip tube thread size is 23/64" - 26. Welds up to 1/2" (12.7mm) plate and heats up to 100,000 BTU. This mixer is UL® listed. Model V-W is also compatible with Victor® 315C Series handles