Need a reliable speedometer for your boat? This Faria Euro series 4-inch speedometer is built tough for marine use and looks great on any dashboard. The clean white face with 55 MPH range gives you easy-to-read speed information while you're cruising. It works using a pitot tube system - water pressure forces into the tube and travels through flexible tubing to the gauge, where it converts that pressure into your actual speed reading. The construction is seriously rugged and designed to handle the marine environment without quitting on you. Installation is straightforward and quick, which is always a plus when you're working on boat projects. The 3.375\ (85mm) hole size fits standard dash cutouts, and the classic Euro styling complements most boat interiors beautifully. Faria is known for making quality marine instruments that last, and this speedometer is no exception. Whether you're just puttering around the lake or running at higher speeds, you'll appreciate having accurate speed information right in front of you. It's one of those simple upgrades that makes your time on the water more enjoyable and helps you stay within safe speed limits too.