Model HP Rev A Pressure Reducing Regulator With Graphite/NBR Gaskets; 1" Line Size; Sales Kit A; Stainless Steel Body With Stainless Steel Spring Chamber; S1 Trim: 316 Stainless Steel Metal Seat, 302 Stainless Steel Diaphragm; 260-425 PSIG Range Spring (Includes OPT-80: High Outlet Pressure Construction)