Coral 2 Battery Condition Indicator GaugePerimeter-lighted Black dial with stylish White and Blue graphics, Black aluminum bezel with burnished leading edge, contoured White pointer, and flat glass lens.A battery condition gauge monitors the state of charge of a 12 volt battery, indicating a dead battery and a charging battery and everything in between. It is connected to the positive terminal (positive stud) and negative terminal (ground stud) of the battery to be monitored.2 - Hole Size: 2.0625 (53mm)Specifications:Scratch Resistant LensBlack Aluminum BezelContoured White PointerFactory P/N VP7903*Sold as an Individual**Gauge Cover not Included