Model "CA5" Do-All Back Pressure Regulator (Series V); Body Size 1", Standard Diaphragm Construction; Investment Cast Cf3m Body, 316l SST Topworks; 316l SST Plug & Cage, 17-7ph SST Diaphragm; Virgin Tfe Seat & Cage;Gasket; (Ffkm) O-Ring Static Seal,;Tfe U-Cup W/SST Energizer Dynamic Seal; Tube End Bw Connections; 100-300 PSIG Range Spring; Internal Sensing, No Lower Return Spring; High Purity Electro Polish To 10ra Avg. Finish, Clean To Spec #S-1662,