Mid-West Instrument P/N 142-AA-10-OO 0-15 PSID, Model 142, 2.5" Dial, 0-15 PSID 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