Brass wetted parts for measuring non-corrosive liquid and gas pressure Circular dial is enclosed in a steel case for corrosion resistance Measures pressure with dual scale (psi/kPa)/(Hg. vacuum/kPa) Display accuracy is + or - 3/2/3% over the entire range of the gauge (ASME B40.100 Grade B) Lower mount or center back male connection with either 1/8" or 1/4" NPT rate