White letters on black face with red pointer and black bezel. Hewitt Industries Boost pressure gauge is provided with a range of 0 -30 psi in a 250 degree sweep. Boost is positive pressure. The Boost pressure gauge comes with a standard 8 ft. long pressure hose along with the appropriate fittings. Turbo boost is a great diagnostic tool. Internal 12VDC. Pointer and Dial L.E.D. Illuminated.