Model "DA6" Dome Loaded Back Pressure Regulator (Series VI)-PLBPV; Body Size 3/4",Standard Diaphragm Construction; Sales Kit A; Cast Iron Body & Loading Chamber; T Trim: 17-4ph SST/Monel Trim With Polyall Seat / Gasket,Neoprene;Diaphragm; Buna-N(Nbr) Static Seals,Tfe Cap Seal W/Buna-N Energizer Dynamic Seal;