Auto Meter Pro-Comp Liquid-Filled Mechanical Vacuum/Boost Gauge - 2-5/8 in.

The standard in the industry, AutoMeter's Mechanical Boost/Vac Gauges have found their way into more builds than any other. Using a patented, high precision bourdon tube meter movement, there isn't another gauge on the market that can lay claim to the levels of accuracy or durability you'll find here. A simple 1/8? NPT pressure connection requires no electrical hookup for operation. Includes 1/8? NPT fittings and nylon line kit.

Traditional incandescent lighting illuminates around the perimeter of the dial