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. Traditional incandescent lighting illuminates around the perimeter of the dial 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, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation Mechanical movements provide accuracy and durability even in the harshest environments Attributes: GTIN: 00046074163210 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: 4.5 x 4.5 x 4.5 inches Weight: 0.5 lb PDF: PDF: 2650-1606