Description The OPW 11® Series automatic nozzles are OPW’s premium conventional nozzles for safe retail and commercial petroleum filling. Materials Body: Aluminum Lever & Lever Guard: Duratuff® Packing: Graphite with Teflon® Disc: Viton® Spout: Aluminum Key Features The OPW 11AP-0400 is UL- and ULC-Listed for use in diesel. Prevents gasoline spills in prepay or card-lock systems utilizing OPW's unique No Pressure – No Flow Device. The nozzle cannot be opened until the pumping system is pressurized, and closes automatically when the pressure is removed. (11B Series Only) Prevents consumer from jamming the nozzle in an open position – Blocker on lever guard. FlowLock™ allows nozzle to shut-off when falling out of a vehicle, and tipped up limiting spillage and unsafe conditions.