LPG Pigtail Hose(Quick-Closing Coupling). Used to connect wallmount regulators to cylinders with New Type 1 valves (outside R.H. Threads). Fully assembled, leak tested and UL Listed. 20" high pressure hose with 1/4" male inverted flare fitting X thermoplastic QCC Nut for quick and easy hand tight connection. Allows no gas flow unless fully connected. Nut has heat sensing feature that shuts off all gas flow if temperatures reach 240 to 300 F. A controlled flow device will activate in case of a down-stream gas system break (at 200 Cu Ft/Hr.) and restrict gas flow (to 10 CFH at 100 PSI).