Model "1000HP-1+8" Diff Press Reg,Dbl Diaph,Graphite/Nbr Gaskets; 3/4" Size,Gaseous Jet; Sales Kit B; Wcc Body,Wcb Spring Chamber With Closing Cap; S2 Trim: Metal Seat,316SST Cylinder,416SST Plug,302SST Diaphragm; Npt Screwed; 10-40 PSId Range Spring