Model "HP" Pressure Reducing Regulator,Graphite/Nbr Gaskets; 1" Size; Wcb Body & Spring Chamber; S36 Trim: 316SST With Tfe Seat,302SST Diaphragm; Npt Screwed; 400-750 PSIG Range Spring (Includes Opt-80: High Outlet Pressure;Construction); Opt-1: Closing Cap