Chesapeake Black 2" Trim Gauge (Mercury / Mariner / Mercruiser / Volvo DP / Yamaha '01 and newer)Perimeter-lighted Black dial with stylish Blue and White graphics, polished stainless steel bezel, contoured White pointer and domed glass lens.2"- Hole Size: 2.0625" (53mm)For Engine Types:(Mercury / Mariner / Mercruiser / Volvo DP / Yamaha '01 and newer)Specifications:. Anti-scratch glass lens. Perimeter lighted back light. 12 VDC negative ground. Can be adapted for 24 VDC systems. Factory P/N GP9402*Sold as an Individual**Gauge Cover not Included