"Brass movement with phosphor bronze Bourdon tube. Grade B #410 stainless steel. 1/4in. NPT 316 brass male connection. Grade B accuracy. For use with air, gas, oil or water. Black enameled aluminum pointer, white background and acrylic window. Glycerin filled. Pointer Black enameled aluminum, Accuracy Grade B, Connection Material 316 Brass, Dial White aluminum, Range PSI 0-15,000, Window Material Acrylic, Connection Size in. 1/4 Male NPT, Gauge Diameter in. 2 1/2, Bourdon Tube Phosphor Bronze, Case Material Grade B #410 Stainless Steel, Fill Material Glycerin, Recommended Use Air, gas, oil, water, Max. PSI 15,000, Movement Brass."