Model "DA1" Pressure Reducing Regulator (Series I); Body Size 3",Standard Diaphragm Construction; Sales Kit A; Cf3m Body,Cast Iron Spring Chamber; P Trim: 17-4ph SST Trim With Polyall Seat,Neoprene Diaphragm,; Buna-N(Nbr) Static Seals,Tfe Cap Seal W/Buna Energizer Dynamic Seal,;Gf-Tfe Wiper;