Model 1000HP Rev A Pressure Reducing Regulator For Standard Service; 1" Line Size, Liquid Jet; 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; 30-60 PSIG Range Spring; OPT-15: Stellited Seat Surface (Includes OPT-14: Integral Seat)