Model 1000HP Rev A Pressure Reducing Regulator For Oxygen Service; 1/2" Line Size, Gaseous Jet; Carbon Steel Body With Carbon Steel Spring Chamber; S2N Trim: 316 Stainless Steel Cylinder, 416 Stainless Steel Plug With Metal Seat, Neoprene (BC) Diaphragm; OPT-30: Mates With ASME 150 Raised Face Flanges; 80-150 PSIG Range Spring