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. Connection Size in. 1/8 Male NPT, Range PSI 0-60, Gauge Diameter in. 1 1/2, Fill Material Glycerin, Pointer Black enameled aluminum, Accuracy ASME/ANSI B40.1 Grade A 2-1-2, Recommended Use Air, gas, oil, water, Mount Type Back, Window Material Temperature compensating polycarbonate, Bourdon Tube C-shaped, Dial White Aluminum, Movement Brass.