Automatic shut-off nozzle for transfer pumps. 1GS nozzle shuts off when the gas tank is full. Equipped with unique Flo-StopÂ® device that shuts off the nozzle if it falls from the fill tank or raises above the horizontal.Comes with full grip guard, hold-open clip and hook. Not for use with gravity tanks. Not legal for retail dispensing applications. Colors other than red and green are available; call for details.