Model "SA1" Do-All Pressure Reducing Regulator (Series I); Body Size 1-1/2", Standard Diaphragm Construction; Barstock 316l SST Body & Topworks; 316l SST Plug & Cage, 17-7ph SST Diaphragm, V-Tfe Seat For Gox Service, Tfe U-Cup W/SST Engergizer Static Seal, Tfe U-Cup W/SST Energizer Dynamic Seal, Ffkm O-Ring Diaphragm Seal; Tube End Bw Connections; 70-200 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