Vacuum and compound ranges through 0 psi to 20,000 psi.5" 304SS Case, 316SS Internals, 6000 psi, 1/4 NPT Male Bottom Conn, -40 Degree Service Filled Cleaning for Oxygen Service O2 is available only for dry or HL Halocarbon filled gauges. 316 Stainless Steel wetted parts.