Model POSR-2 Rev A Pilot Operated Pressure Reducing Regulator, PTFE Gaskets; 2" Line Size; Main Valve: Carbon Steel Body, Stainless Steel Cylinder, Ductile Iron Bonnet, Pilot Valve: Ducitle Iron Body And Carbon Steel Spring Chamber, Mounting Position H; S2 Hard Trim: Main-416 Stainless Steel Seat, 17-4PH Plug, Pilot-416 Stainless Steel, 302 Stainless Steel Diaphragm; NPT End Connections; 30-80 PSIG Range Spring