Russell Performance – 0-15 psi Fuel Pressure Gauge (Non-Liquid Filled) #650350 Engineered for the serious street enthusiast, these gauges guarantee precise fuel pressure settings from 0 to 100 psi. Each comes with an easy to read face. These gauges have a chrome plated steel case with 1/8″ NPT male inlet. Available in both liquid-filled and non-liquid filled models. Designed to withstand severe vibration to extend service and performance for automotive and marine usage.