K4530 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 60 Dry Dampening Feature None Vibration Resistance None Dial Color White Pressure Gauge Type HVAC Dial Pressure Gauge Bolt Circle Diameter 4.1 in