Model "HP" Pressure Reducing Regulator,Grafoil Gaskets (Opt-46g); 1" Size; Wcb Body & Spring Chamber; S1 Trim: 316SST Metal Seat,302SST Diaphragm; Opt-30: 600 Lb Raised Face Flanges; 400-750 PSIG Range Spring (Includes Opt-80: High Outlet Pressure;Construction); Opt-15: Stellited Seat SuRFace; Opt-80: High Pressure Spring Chamber Construction