Whatever temperature source you need to measure, AutoMeter's Mechanical Temperature Gauges will provide you a highly accurate, bullet proof reliable solution. The bourdon tube meter movement used in this gauge is engineered to function in even the harshest conditions and no electrical connection is needed for operation. A 6' Capillary tube and 1/2” NPT mounting nut are included.Features: Traditional incandescent lighting illuminates around the perimeter of the dial Liquid dampened movement provides smooth pointer movement and extended service life in harsh environment applications. Liquid filled design for superior resistance to shock, vibration, and the elements. AutoMeter’s race proven mechanical instruments provide trusted accuracy while being simple to install No electrical system required for gauge operation - compatible with every street or race vehicle Gauge kit includes 1/2" NPT adapter, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation Product Description: 2-5/8" Temperature, 140-340°F, Liquid Filled, Pro-CompPit Stop USA offers Auto Meter Pro-Comp Liquid Filled Water Temperature Gauge - 2-5/8" - 140°-340° 5435 at low everyday prices. Be sure to check out all our products from Auto Meter including Auto Meter Mechanical Water Temp Gauges and Auto Meter Water Temp Gauges.