MaxTow Double Vision 30 PSI Turbo Boost/Vacuum Gauge Kit - Includes Electronic Pressure Sensor - White Gauge Face - Green LED Dial - Analog & Digital Readouts - For Gas Trucks - 2-1/16" 52mm 2 1/16 Inch White Gauge Face with a Magnified Lens Boost Reading from 0 to 30PSI and Vacuum and Compression Levels Between -30 to 0 inHG Double Vision Display Feature with Analog and Digital Readings Electronic Boost Pressure Sensor, 9 Foot Boost Pressure Sensor Wire, 6 Feet of Vacuum Hose and T-Fitting, and 3 Foot Power Wire Mounting Hardware, Installation Instructions, Free Lifetime Technical Support, and a One Year Limited Warranty