Flat Under Bezel; 3 1/8 inch ID, 4 inch OD - For use Under any Gauge Having a 3 1/8 inch Case Diameter - Available in 10 Decorative Powdercoated Colors 3-FL318$15.30 Bezel Color: WhiteYellowGoldRedPurpleBlueTealBrushed AluminumChromeBlack