Mr. Gasket Liquid Filled Fuel Pressure Gauges accurately, reliably monitor pressure and are uniquely designed to resist vibration. This gauge comes with a brass junction block and a 3/8-inch fuel line adapter that's perfect for checking fuel pressure while tuning your engine. The 1.5-inch mechanical analog gauge reads in 1/2-pound increments across a range from 0 to 15 pounds, fits almost anywhere, and features a 270-degree sweep, an easy-to-read white face with black numbers, and a chrome bezel.