Dress White 2" Trim Gauge (Mercury / Mariner / Mercruiser / Volvo DP / Yamaha '01 and newer) Perimeter-lighted White dial with bold Black graphics, White aluminum bezel, contoured Black pointer and flat 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. 12 VDC negative ground. Can be adapted for 24 VDC systems. Factory P/N GP9712*Sold as an Individual*Gauge Cover not Included