Features anodized blue exterior, and many unique features specifically designed for sprint cars and other forms of racing. The luminescent dial glows at night for dimly lit tracks when no battery is available to light up conventional gauges. A sealed, water-resistant case keeps moisture and debris out for easy cleaning. These gauges are for racing purposes only, and will not operate properly in a street driven vehicle. (6 foot capil.) Gauge includes a 1/2in. NPT aluminum fitting.