H8403 Pressure Gauge Liquid Filled 4 In. 1000 psi Connection Size 1/2 in NPT Connection Location Lower Smallest Graduation 20 psi Graduations 200 psi Accuracy +/-2-1-2 Percent Case Material Stainless Steel Case Color Silver Socket Material Copper Alloy Tube Material Copper Alloy Filled With Glycerine Lens Material Polycarbonate Ring Material Stainless Steel Operating Temp Range 30 Degrees to 160 Degrees F Required Gauge Adapter No Calibration Certificate Available Separately