Model "DA4" Pressure Loaded Reducing Valve (Series IV)-PLPRV; Body Size 3",Standard Diaphragm Construction; Sales Kit A; Cast Iron Body & Loading Chamber; 17-4ph SST Plug/Cage/Piston Guide Bearing,Neoprene Diaphragm,Polyall;Seat; Buna-N(Nbr) Static Seals,Tfe Cap Seal W/Buna Energizer Dynamic Seal,;Gf-Tfe Wiper