The Sinister Diesel Fuel Pressure gauge is a great way to ensure you're accurately dialing in your fuel pressure. It's designed to give the most accurate readings between 0 and 100PSI. It's liquid-filled for protection against vibration, pulsation and pressure spikes. They also keep dirt and humidity out. It's finished off with a Sinister Blue gauge face. Features a 1 Year Warranty., Note: This gauge is intended for testing/tuning purposes and is not designed to remain installed while driving.