Model P3 Rev A Two Stage Cylinder Gas Pressure Reducing Regulator; 1/2" Line Size, Cv=0.02; Stainless Steel Body With Stainless Steel Spring Chamber; Trim Code 3: 302 Stainless Steel Diaphragm With PTFE Gasket, PTFE Seat, 316L Stainless Steel Seat Retainer And Poppet, Inconel X-750 Poppet Spring; Port Configuration F; NPT End Connections; 2-100 PSIG Range Spring; 0-100 PSIG Outlet Gauge; 0-5000 PSIG Inlet Gauge; Cleaned For Hydrogen Service Per Cashco Specification S-1821