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.Features: Modern blue LED through-the-dial lighting provides clear visibility during nighttime use 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 1/8” nylon line, T-Fitting, vacuum fitting, compression fittings, mounting hardware, and detailed instructions for installation Mechanical movements provide accuracy and durability even in the harshest environments Product Description: 2-1/16" Boost/Vacuum Gauge, 30 In Hg/45 PSI, CobaltPit Stop USA offers Auto Meter Cobalt Mechanical Boost / Vacuum Gauge - 2-1/16 in. 6108 at low everyday prices. Be sure to check out all our products from Auto Meter including Auto Meter Pressure Gauges.