Auto Meter's 2696 HPOP Gauge is a great way to keep an eye on your engine's high pressure oil pump pressure. The full sweep, 0-4,000 PSI gauge is 12 and 16 volt compatible and comes with a wiring harness, bulb and socket assembly, red and green bulb covers, and mounting hardware. Traditional incandescent lighting illuminates around the perimeter of the dial for easy monitoring.