This QuickCar Gauge displays fuel pressure and comes with LED backlighting. Display has a 0-15 PSI Range and gauge is a 2-5/8" Diameter. This is Mechanical type gauge with a Male 1/8" NPT connection on the back. Pressure line kit and warning light switch not included and sold separately. Sold each. *Individual gauges do not include sending units/pressure switches. Sending Unit Part Number PPM889-3021.