Mr. Gasket Fuel Pressure Gauges accurately, reliably monitor pressure and empower you to easily make changes with an adjustable fuel-pressure regulator. These 1.5-inch mechanical analog gauges read in 1/2-pound increments across a range from 0 to 15 pounds, fit almost anywhere, are compatible with any 1/8-inch NPT female port, and feature a 270-degree sweep, an easy-to-read white face with black numbers, and a chrome bezel.