"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. Accuracy Grade B, Dial White aluminum, Connection Material 316 Brass, Max. PSI 15,000, Movement Brass, Range PSI 0-15,000, Window Material Acrylic, Case Material Grade B #410 Stainless Steel, Fill Material Glycerin, Recommended Use Air, gas, oil, water, Pointer Black enameled aluminum, Connection Size in. 1/4 Male NPT, Gauge Diameter in. 2 1/2, Bourdon Tube Phosphor Bronze."