Model "DA1" Pressure Reducing Regulator (Series I); Body Size 1/2",Standard Diaphragm Construction; Bronze Body & Spring Chamber; 17-4ph SST Trim, 316l SST Cage, Pa Seat, Fkm Diaphragm,;Fkm Static Seal, O-Ring Dynamic Seal; Npt End Connection; 70-200 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction