Differential Pressure Gauge, Gauge Nominal Dial Size 2 1/2 in, Basic Gauge Case Material Metal, Basic Gauge Wetted Parts Stainless Steel / Buna-N, Differential Gauge Connection Type FNPT, Differential Gauge Connection Size 1/4 in, Gauge Connection Location Back, Differential Pressure Range Units psi, Differential Pressure Range Value 0 to 75, Gauge Accuracy +/-3-2-3 Percent, Body Material Aluminum, Gauge Primary Range Smallest Graduation 5, Piston Material Stainless Steel, Seal Material Buna-N