Vacuum Gauge General Purpose 3-1/2 In. Basic Gauge Case Material Stainless Steel Basic Gauge Wetted Parts Stainless Steel 1/4 In. MNPT Gauge Connection Location Bottom -30 to 0 in Hg +/-1.50 Percent Gauge Panel Mountable No Liquid Filled Yes Gauge Primary Range Smallest Graduation 0.5 Gauge Case Material 304 Stainless Steel Gauge Primary Range Numbered Graduations 1 Gauge Case Color Stainless Steel Calibration Certificate Included No