When your propane tank runs dry in the middle of cooking, the Mr. Heater F276171 will connect your appliance to new and old disposable propane cylinders to help finish the job. Features: * Most commonly used with 1 lb. bottles to grills or distribution posts to grills * Female throwaway cylinder thread x female P.O.L. and QCC-1 * Brass construction * .19 cubic feet * 4.75 in. L x 2 in. W What"s In The Box: * Mr. Heater F276171 Steak Saver Propane Adapter