The Mr. Heater 8 ft. Propane Hose Assembly with Fuel Gauge is commonly used to connect appliances designed for 1 lb. propane cylinders up to larger external propane sources. Features an acme nut and 1 in.- 20 male throwaway cylinder thread, fuel gauge with glow in the dark indicator, and solid brass fittings. Stretch tested to 400 psi and pressure tested to 600 psi. For use with Buddy series models: MH9BX, MH12HB, and MH18B. Use with a fuel filter is highly recommended.