The X-Series Wideband UEGO AFR Gauge (PN 30-0300) has a diameter of 2 1/16th-inch (52mm) and features a modern, visually striking faceplate and a new central seven-segment display that is 87% larger than the central display of the gauge with code 30-4110 (the old generation). This creates the perception of a larger overall gauge, but in a common 52mm size for easy installation. Its slim thickness (overall less than one inch) dramatically increases the application base and potential mounting locations.