Perimeter and thru-dial lighting, Scratch resistant curved glass lens with black near-flush bezels, Gauge Description : Mariner/Merc/Cobra/Volvo DP, SX, Yamaha 2001 and on, Hole Size : 2.13, Housing O.D. : 2.08, Operating Temperature : -40C to +70C, Sender Code: BY ENG. MFR, Sender Code: BY ENG. MFR, Size: 2",