Pressure Gauge, 2.5 in. Brass Case, Copper Alloy Internals, 5000 psi/kPa, 1/4 NPT Male Back Conn, Glycerin Filled, Chrome Bezel & U-Clamp. High quality, heavy-duty liquid filled gauge. Vacuum and compound ranges through 0 psi to 15,000 psi. Die cast Brass case with natural Brass finish. Copper alloy or 316 Stainless Steel and Brass wetted parts. Cleaning for Oxygen Service O2 is available only for dry or HL Halocarbon filled gauges. For gauges with MIP, GY40 fill is standard for liquid filled gauges.