5" 304SS Case, 316SS Internals, 160 psi/bar, 1/4 NPT Male Bottom Conn, -40 Degree Service Filled For gauges with MIP, GY40 fill is standard for liquid filled gauges. Cleaning for Oxygen Service O2 is available only for dry or HL Halocarbon filled gauges. Vacuum and compound ranges through 0 psi to 20,000 psi. Pressure Gauge, 2.