The White & Green MaxTow Oil Pressure Gauge is an electronically-driven truck gauge that reads and displays oil pressure levels up to 100 PSI, ensuring that your bearings, crankshaft and other critical engine components remain properly lubricated. Part of the White & Green MaxTow Double Vision Gauge Series, this gauge also gives you the classic look of an analog gauge with an illuminated red needle and green LED display, as well as an easy-to-read green digital numerical readout on a white face.