Model D Rev D Pressure Reducing Regulator For Standard Service; 1" Line Size; Bronze Body And Spring Chamber; B4 Trim: Brass With PTFE Seat And Fluorocarbon Elastomer (FKM) Diaphragm; NPT Threaded End Connections; 30-80 PSI Range Spring; Without Piston Stabilizer; Without Handwheel And Locking Lever; Vented Spring Chamber Plug (Polyethylene); Without Gauge Ports; Opt-55: Oxygen Cleaning Per Cashco Specification S-1134