Model "HP" Pressure Reducing Regulator,Graphite/Nbr Gaskets; 3/4" Size; Cf8m Body & Spring Chamber; S36b Trim: 316SST With Tfe Seat, Buna-N O-Rings,;302SST Diaphragm; Npt Screwed; 400-750 PSIG Range Spring (Includes Opt-80: High Outlet Pressure;Construction)