Autometer Ultra-Lite 52mm 30 IN HG/45 PSI Mechanical Boost/Vacuum Gauge (4308)The standard in the industry, AutoMeters Mechanical Boost Vac Gauges have found their way into more builds than any other. Using a patented, high precision bourdon tube meter movement, there isnt another gauge on the market that can lay claim to the levels of accuracy or durability youll 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 Traditional