Engines don't like high water temperatures, Heat is the enemy of performance and reliability. Keep tabs on your temps with the most accurate, quickest responding water temperature gauge on the market. AutoMeter's advanced bourdon tube meter movement provides unparalleled performance in the most demanding applications. A 4' capillary tube and 1/2” NPT mounting nut are included.Features: Luminescent dials glow green at night for dimly lit tracks when no battery is available to light conventional instruments For racing use only - Not intended for street applications No electrical system required for gauge operation - compatible with every street or race vehicle AutoMeter’s race proven mechanical instruments provide trusted accuracy and durability in the harshest environments while being simple to install 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" Water Temperature Gauge, 140-280°F, Ultra-NitePit Stop USA offers Auto Meter Ultra-Nite Water Temperature Gauge - 2-5/8" - 140°-280° 4535 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 and Auto Meter Water Temperature Gauges.