Turbosmart's mechanical boost gauge is designed to provide reliable performance and accurate readings. With its black dial, silver bezel, bright backlight and a vacuum range of 0 to 2 bar (52 mm - 2 1/16"). The Turbosmart boost gauge looks great on the dashboard and provides all necessary hardware for hookup and assembly This makes installation quick and easy - no additional parts or tools required With Turbosmart's Mechanical Boost Gauge, you can count on safe, accurate readings day after day! day.