BRAND: MOONEYES CLASSIC INSTRUMENTS SIZE: 2.25" Diameter CONDITION: Good, with minor scuffs around beauty ring. Overall in good working and cosmetic condition QTY: 1 DESCRIPTION: This is a Mooneyes vacuum gauge with a black face, white lettering, chrome bezel, and the iconic MOON "eyes" logo at the bottom, manufactured in collaboration with Classic Instruments. It measures engine vacuum from 0 to 30 in. Hg (inches of mercury) to help monitor engine health, tune carburetors, or check for vacuum leaks.