Model "1000HP-1+8" Diff Press Reg,Dbl Diaph,Graphite/Nbr Gaskets; 2" Size,Gaseous Jet; Sales Kit B; Cast Iron Body & Spring Chamber With Closing Cap; B1 Trim: Metal Seat,Brass Cylinder,416SST Plug,302SST Diaphragm; Npt Screwed; 10-40 PSIG Range Spring; .023/.032 Diaphragm Setting,Tfe Tape Adjusting Screw