Model D Rev D Pressure Reducing Regulator For General Service; 1" Line Size; Sales Kit B; Bronze Body And Spring Chamber; B5 Trim: Brass With PTFE Seat And Phosphor Bronze Diaphragm; NPT Threaded End Connections; 10-40 PSI Range Spring; Polyethylene Vented Spring Chamber Plug; Opt-55: Oxygen Cleaning Per Cashco Specification S-1134