Brass movement with C shaped Bourdon tube. 1/8 NPT male connection. For use with air, gas, oil or water. Black enameled aluminum pointer, white aluminum dial and temperature compensating polycarbonate window. Glycerin filled to dampen pulse and vibration. Accuracy ASME/ANSI B40.1 Grade A 2-1-2. Movement Brass, Connection Size in. 1/8 Male NPT, Bourdon Tube C-shaped, Pointer Black enameled aluminum, Accuracy ASME/ANSI B40.1 Grade A 2-1-2, Dial White Aluminum, Range PSI 0-200, Window Material Temperature compensating polycarbonate, Fill Material Glycerin, Gauge Diameter in. 1 1/2, Recommended Use Air, gas, oil, water, Max. PSI 200, Mount Type Back.