Easily keep track of your boat's battery charge and electrical flow with the Sierra Black Sterling Voltmeter Gauge. Beneath its scratch-resistant domed glass lens, the spun-aluminum dial measures and displays your direct electrical current from 8 to 18V. Within the stainless steel bezel, the black pointer with fire-orange tip can easily be seen in front of the white and black background. The inner perimeter of this boat gauge from Sierra is lit for nighttime viewing. Fits most stern drive and outboard applications. Size: 2". At a glance, know boat's battery charge and electrical flow. Scratch-resistant domed glass lens. Strong stainless steel bezel. Spun-aluminum dial displays current from 8 to 18V. Black pointer with fire-orange tip. White and black background. Lit for nighttime viewing. Fits most stern drive and outboard applications.