Model D Rev D Pressure Reducing Regulator For General Service; 1/2" Line Size; Sales Kit A; Stainless Steel Body And Spring Chamber; S36 Trim: 316 Stainless Steel With PTFE Seat With 302 Stainless Steel Diaphragm; 30-80 PSI Range Spring; Opt-4: Piston Stabilizer For Gaseous Service; Polyethylene Vented Spring Chamber Plug; Opt-55: Oxygen Cleaning Per Cashco Specification S-1134