Model 1000LP Rev A Pressure Reducing Regulator, Grafoil Gaskets (OPT-46G); 1/2" Line Size, Gaseous Jet; Sales Kit A; Carbon Steel Body With Carbon Steel Spring Chamber; S1 Trim: 316 Stainless Steel Cylinder And Plug With Metal Seat, 302 Stainless Steel Diaphragm; OPT-30: Mates With ASME 150 Raised Face Flanges; 4-15 PSIG Range Spring