This vacuum gauge provides an easy and efficient means of checking the engine vacuum or testing fuel pump operation. It helps to identify and diagnose system vacuum leaks and problems in the engine, and the various vacuum-operated motors and accessories. It accurately checks system fuel pressure on vehicles that are equipped with carburetors and features a 3 1/2-in easy-to-read face, a 24-in oil-resistant rubber hose with a universal fitting adaptor, a tapered adapter, and a tee connector.