The Globe master flush mount compass from Richie Navigation easily fits a 6 1/4" mounting hole. It features a Power Damp dial with cards available in 5 degree, 2 degree, or 2 degree with points with a choice of green or red lighting in 12, 24 or 32 Volts. The Globe master also comes with full internal gimbaling and 90 degree lubber lines for easy reading.