Faria Dress White 2" Fuel Level Gauge (Metric)2" Fuel Level Gauge (E 1 2 F) Perimeter lighted White dial with bold Black graphics, White aluminum bezel, contoured Black pointer and flat glass lens. Fuel Level gauge operates by sending a low amperage current through the gauges meter to ground via a sending unit with variable resistance. The resistance of the sending units increase or decrease with the changes in pressure, temperature, etc As the sender's resistance varies, the amount of current