Differential Pressure Gauge, Gauge Nominal Dial Size 3 1/2 in, Basic Gauge Case Material Metal, Basic Gauge Wetted Parts PTFE / Buna-N / Viton or EPDM, Differential Gauge Connection Type FNPT, Differential Gauge Connection Size 1/4 in, Gauge Connection Location Inline, Differential Pressure Range Units psi, Differential Pressure Range Value 0 to 30, Gauge Accuracy +/-2.00 Percent, Body Material Aluminum, Gauge Primary Range Smallest Graduation 1, Diaphragm Material Buna-N, Piston Material PTFE