Air Fuel Ratio Single Gauge (2 1/16") DESCRIPTION: All PLX Single Gauges are standard sized 2 1/16" (52mm) LED automotive displays designed to display the values measured from your PLX Sensor Modules. Measuring only 0.7" (18mm) thin, it can virtually be mounted anywhere. The Single Gauge is designed to fit into most aftermarket 2 1/16" (52mm) cups, and mounts for seamless integration into your vehicle. Available in both black and white the Single Gauges are an ideal accessory for your PLX Sensor Modules.