VIAIR 90088 Black Face 2" 160 PSI Illuminated Single Needle Gauge Two inch diameter Single Need Gauge, reads up to 160PSI or 11 BAR. Illuminates so pressures can be read at night. Requires connection to 12v power. Gauge panel mounting via included surface clamp 1/8 inches NPT port (at rear) Typically used to monitor pressure in air suspension systems or onboard air systems.