MARSHALL EXCELSIOR High Pressure Hose - Quick Disconnect Hose Assembly designed to connect to the propane supply on an RV or trailer that has a built-in Quick Connect propane connection. The Quick Disconnect eliminates the need for tools and wrenches. Simply push to connect, and pull to disconnect. HP hose 1/4in ID, QD x 1/4in MNPT with cap. 50011 is 144in long.