This diverse series of gauges combines the classic tough Auto Meter look with over 30 years of race proven design. Red pointer for quick glance monitoring. Rugged reliable performance. Precision movement and extreme accuracy.. Traditional incandescent lighting illuminates around the perimeter of the dial 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system Gauge kit includes 1/8” NPT temperature sender, 3/8” and 1/2" NPT adapters, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation Auto Meter’s race proven air-core electric instruments provide quick and accurate readings while keeping hazardous fluids outside of the vehicle