Automatic shut-off nozzle for farm, 12V skid tanks, large pumps with or without air eliminators and commercial applications. 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. Not for use with gravity tanks. Not legal for retail dispensing applications. Not UL Listed.