The NOS Nitrous Pressure Gauge measures from 0 - 1500 PSI ,although the recommended level is 900-950 PSI, and is essential in monitoring the bottle. Nitrous Pressure Gauge, 1 1/2 inch diameter. Product Features:Engineered w/Greater AccuracyEngineered With ConvenienceQuick/Accurate Pressure CheckMaximize PerformanceNitrous Pressure GaugeMeasures 0-1500 psi
