K4221 Industrial Vacuum Gauge Nominal Dial Size 4 1/2 in Accuracy +/-0.5 Percent Gauge Case Material Stainless Steel Process Connection Type NPT Process Connection Gender Male Lens Material Glass Process Connection Size 1/4 in Field Fillable No Process Connection Location Bottom Case Color Chrome IP/NEMA Rating Not Rated Primary Pressure Range 30 to 0 Dry Dampening Feature None Vibration Resistance None Dial Color White Pressure Gauge Type Industrial Pressure Gauge