Mid-West Instrument P/N 130-BC-10-OO 0-50 "H2O, Model 130, 4.5" Dial, 0-50 "H2O DP Range, Plastic Case, Brass Body, SS Trim, Viton Diaphragm Wetted Parts, 1/4"FNPT Top / Bottom Connections, 500 PSIG Max. Working Pressure, 2% of FS Ascending Accuracy, Diap