Model "1000HP-1+8" Diff Press Reg,Dbl Diaph,Graphite/Nbr Gaskets; 1-1/2" Size,Liquid Jet; Sales Kit A; Ductile Iron Body & Spring Chamber With Closing Cap; S1 Trim: Metal Seat,316SST Cylinder & Plug,302SST Diaphragm; Npt Screwed; 10-40 PSId Range Spring