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