Mid-West Instrument P/N 142-AC-10-OO 0-30 "H2O, Model 142, 4.5" Dial, 0-30 "H2O DP Range, Plastic Case, Aluminum Body, SS Trim, Viton Diaphragm Wetted Parts, 1/4"FNPT Back Connections, 3000 PSIG Max. Working Pressure, 2% of FS Ascending Accuracy, Diaphrag