Model "DA4" Pressure Loaded Reducing Regulator (Series IV)-PLPRV; Body Size 1",Standard Diaphragm Construction; Sales Kit A; Bronze Body & Loading Chamber; 17-4ph SST Trim, 316l SST Cage, Gf-Tfe Seat, Fkm Diaphragm;Fkm Static Seal, O-Ring Dynamic Seal;