Model "CA1" Do-All Pressure Reducing Regulator(Series I); Body Size 1", Standard Diaphragm Construction; Sales Kit A; Investment Cast Cf3m Body, 316l SST Topworks; 316lSST Plug & Cage, 17-7ph SST Diaphragm; Polyall Seat,;Tfe U-Cup W/SST Energizer Static Seal,;Tfe U-Cup W/SST Energizer Dynamic Seal; High Purity Electro Polish To 10ra Avg. Finish, Clean To Spec;#S-1662; With Closing Cap/Rain Coat