Speed across the lake or take a leisurely cruise along the shoreline, with the Sierra Black Sterling Speedometer Gauge, you'll know exactly how fast your boat is traveling. Beneath its scratch-resistant domed glass lens, the spun-aluminum dial shows your boat's speed from 0 to 70 mph and metric speed from 0 to 115 kph. 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: 3". At a glance, know how fast your boat is traveling. Scratch-resistant domed glass lens. Strong stainless steel bezel. Spun-aluminum dial displays speed from 0 to 70 mph. Black pointer with fire-orange tip. White and black background. Lit for nighttime viewing. Fits most stern drive and outboard applications.