2-5/8in. VACUUM; 0-30 IN HG; CARBON FIBERWhether tuning your vehicle for maximum performance or monitoring your driving for maximum fuel economy, AutoMeter's Digital Stepper Motor Vacuum Gauge has been the solution trusted by professionals for years. An ultra precise digital stepper motor meter movement sits at the heart of this instrument, providing the kind of accuracy and durability necessary to compete at the highest levels. Includes Data Logger Output Socket Assembly Red/Green Bulb Covers Digital Stepper Motor Provides Unmatched Accuracy Easy Data Acquisition Installation Ultimate High Performance Dial Face Look Air Fuel Ratio Gauge 1 Year Limited Warranty Traditional Incandescent Lighting Illuminates Perimeter Of Dial Incl. Data Acquisition Solid-State Pressure Transducer Incl. 1/8 in NPT Pressure Transducer Inc. Wiring Harness Mounting Hardware Installation Instructions Incl. Bulb