Model "POSR-2" Pilot Operated Pressure Reducing Regulator,Tfe Gaskets; 1" Size; Sales Kit B; Main Valve-Ir Body, Cs Cyl, Di Bonnet; Pilot Vlv-Di Body & Ir Sp. Ch; S2 Hard Trim: Main-416SST Seat,17-4ph Plug,Pilot-416SST,302SST;Diaphragm; 10-40 PSIG Range Spring