These are for Liquid Propane where high output is required. They allow full use of fuel in the cylinder (5-30psi). The FT6-7 has a 2ft handle with grip, and a Sch 80 coiled head for 700,000 BTU. SPECIAL NOTE: Torches, hoses, etc are intended for OUTDOOR use only. Proper care and maintenance to be followed, always check connections and hoses for leaks or damage. Use safety precautions and do not use torches near any combustible fluids or equipment.