Model 1000HP Rev A Pressure Reducing Regulator, Cleaned For Hydrogen Service Per Cashco Specification S-1821; 1" Line Size: Gaseous Service; Stainless Steel Body With Stainless Steel Spring Chamber; S36 Trim: 316 Stainless Steel Cylinder And Plug With PTFE Seat, 302 Stainless Steel Diaphragm; OPT-32: Schedule 80 Plain End Extended Nipples; 65-150 PSIG Stainless Steel Range Spring; OPT-12: One-Step Reduced Orifice