Model 80 Stainless Steel Anhydrous Ammonia GaugesThis rugged product employs a 316 Stainless Steel bourdon tube, ASME grade A movement, and a Stainless Steel socket all housed in a corrosive-resistant painted steel case.Movement - 316 Stainless SteelBourdon Type - 316 Stainless SteelPointer - Black enameled aluminumCase Material - Enameled SteelWindow - AcrylicDial - White aluminumConnection Size - 1/4a€ MNPTConnection Material - Stainless SteelAccuracy - ASME/ANSI B40.1 Grade A (2-1-2%)Fill Material - Dry OnlyWetted Parts - Stainless Steel