Model SA1 Rev D Ultra High Purity Pressure Reducing Regulator; 1-1/2" Line Size; Sales Kit A; Stainless Steel Body With Stainless Steel Spring Chamber; 316L Stainless Steel Trim, 17-7PH Stainless Steel Diaphragm, Pollyall Seat, Stainless Steel/PTFE U-Cup Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal, FFKM O-Ring Diaphragm Seal; OPT-1: Closing Cap; High Purity Electro Polish To 10Ra Finish, Cleaned For Ultra High Purity Service To Cashco Specification S-1662