Description The OPW 11B-0900 series is designed for use in retail and commercial filling applications including prepay, self- and full-service, credit/debit card readers or card-lock systems to help prevent spills. Key Features 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. Prevents consumer from jamming the nozzle ina an open position - blocker on lever guard. FlowLock™allows nozzle to shut-off when falling out of a vehicle, and is tipped up, limiting spillage and unsafe conditions.