Quick Overview 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 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. Modern white LED through-the-dial lighting provides clear visibility during nighttime use Autometers 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 Attributes: GTIN: 00046074163258 Brand Name: AutoMeter Add-On: 3224;3227;3228;3229;3226 Extended Information: Country of Origin: United States Emissions : Released Life Cycle Status: Available To Order Packing Information: Quantity of Each: 1 Package UOM: EA Dimension: 4.75 x 4.25 x 4.5 inches Weight: 0.7 lb PDF: PDF: 2650-1606