Liquid Filled White Dual Scale 15 PSI Fuel Pressure Gauge 1.5" dia 1 1/2" / 38.00mm Diameter White Dial with Black Pointer Black Numbers, Markers and Text, Dual Scale using PSI & KP Rugged Stainless Steel Case, Brass Internals,Acrylic Lens Full Sweep 1/8" NPT Center Back Connection, Will directly screw into any 1/8 NPT female port. Not for use with fuel injected applications.