Model "SA1" Do-All Pressure Reducing Regulator (Series I); Body Size 3/4", Standard Diaphragm Construction; Barstock 316l SST Body & Topworks; 316l SST Plug & Cage, 17-7ph SST Diaphragm; Polyall Seat,;Ffkm O-Ring Static Seal,;Tfe U-Cup W/SST Energizer Dynamic Seal; Tube End Bw Connections; 30-150 PSIG Range Spring; Internal Sensing, 2-5 PSIG Lower Spring; Opt-1: Closing Cap; High Purity Electro Polish To 10ra Avg. Finish, Clean To Spec;#S-1662