Model "HP" Pressure Reducing Regulator,Graphite/Nbr Gaskets; 3/4" Size; Wcb Body & Spring Chamber; S1 Trim: 316SST Metal Seat,302SST Diaphragm; Opt-32: Schedule 160 Pe Ext Nipples - (Sds Spec Required); 10-40 PSIG Range Spring; Opt-1+6: Differental Construction With Closing Cap