Model DA1 Rev E Pressure Reducing Regulator; 1/2" Line Size; Bronze Body With Bronze Spring Chamber; PE 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, PTFE Seat, FEP Laminated Fluorocarbon Diaphragm, Stainless Steel/PTFE U-Cup Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; 30-150 PSIG Range Spring; Internal Sensing; OPT-55: Cleaned For Oxygen Service Per Cashco Specification S-1134