Model 1000HP-1+8 Rev B Pressure Reducing Regulator For Standard Service; Double Diaphragm; Graphite/NBR Gaskets; Includes Closing Cap; 3/4" Line Size, Gaseous Jet; Sales Kit B; Ductile Iron Body With Ductile Iron Spring Chamber; S2 Trim: 316 Stainless Steel Cylinder, 416 Stainless Steel Plug With Metal Seat, 302 Stainless Steel Diaphragm; NPT End Connections; 10-40 PSID Range Spring