Model D Rev D Pressure Reducing Regulator For Cryogenic Service (Requires Cryogenic Lubricants During Assembly); 1/2" Line Size; Stainless Steel Body And Spring Chamber, Oxygen Cleaning Per Cashco Specification S-1134; S1 Trim: 316 Stainless Steel Metal Seat And 302 Stainless Steel Diaphragm; NPT Threaded End Connections; 70-150 PSI Range Spring; Vented Spring Chamber Plug (Polyethylene)