Model HP Rev A Pressure Reducing Regulator With Graphite/NBR Gaskets; 1" Line Size; Carbon Steel Body With Carbon Steel Spring Chamber; S3 Trim: 316 Stainless Steel With PTFE Seat, Neoprene (BC) Diaphragm; OPT-32: Schedule 160 Plain End Extended Nipples; 120-225 PSIG Range Spring