Model HP Rev A Pressure Reducing Regulator With Graphite/NBR Gaskets; 3/4" Line Size; Sales Kit B; Carbon Steel Body With Carbon Steel Spring Chamber; S1 Trim: 316 Stainless Steel Metal Seat, 302 Stainless Steel Diaphragm; 30-150 PSIG Range Spring; OPT-1+6: Differental Construction With Closing Cap