Model 1000HP-1+6 Rev B Pressure Reducing Regulator For Standard Service; Single Diaphragm; Graphite/NBR Gaskets; Includes Closing Cap; 1/2" Line Size, Gaseous Jet; Sales Kit A; Ductile Iron Body With Ductile Iron Spring Chamber; S1 Trim: 316 Stainless Steel Cylinder And Plug With Metal Seat, 302 Stainless Steel Diaphragm; NPT End Connections; 10-50 PSID Range Spring