Velocity Black 2 1/8" Full sweep Air Fuel Ratio gauge, with standard matte-black performance bezel and flat glass lens. Features include: Rugged air core movement combined with microprocessor technology for precision and durability, full sweep for increased accuracy, small 2 ⅛" hole size, push-button calibration, integrated red warning light that illuminates the entire gauge when activated, warning light output for additional indicator lights, analog .5 – 4.5VDC output for data logging systems, LED lighting with options for Warm White or Cool White, premium BOSCH wideband air/fuel sensor, FAST™ wideband controller, installation hardware, wiring harness, and weld-in bung with plug included, calibrated for gasoline applications only (please call for additional fuel applications). Please select curved lens when choosing a Radial bezel. WARNING: This product can expose you to Lead which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.