Panel-Mount Pressure Gauge, Nominal Dial Size 3 1/2 in, Accuracy +/-1.0 Percent, Gauge Case Material Steel, Process Connection Type NPT, Process Connection Gender Male, Lens Material Glass, Process Connection Size 1/4 in, Field Fillable No, Process Connection Location Center Back, Case Color Black, IP/NEMA Rating IP52, Primary Pressure Range 0 to 100, Dry Dampening Feature None, Vibration Resistance None, Dial Color White, Pressure Gauge Type HVAC Dial Pressure Gauge, Bolt Circle Diameter 4.1 in WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -