Model HP Rev A Pressure Reducing Regulator With Graphite/NBR Gaskets; 1/2" Line Size; Sales Kit B; Stainless Steel Body With Stainless Steel Spring Chamber; S36 Trim: 316 Stainless Steel With PTFE Seat, 302 Stainless Steel Diaphragm; 400-750 PSIG Range Spring (Includes OPT-80: High Outlet Pressure Construction)