Model "HP" Pressure Reducing Regulator,Grafoil Gaskets (Opt-46g); 1" Size; Wcb Body & Spring Chamber; S1 Trim: 316SST Metal Seat,302SST Diaphragm; Opt-32: Schedule 160 Pe Ext Nipples - (Sds Spec Required); 400-750 PSIG Range Spring (Includes Opt-80: High Outlet Pressure;Construction); Opt-56: Special Clean Per Spec #S-1542