Model 1000HP Rev A Pressure Reducing Regulator For Standard Service; 1-1/2" Line Size, Gaseous Jet; Carbon Steel Body With Ductile Iron 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; 30-75 PSIG Range Spring