Model DA6 Rev E Pressure Loaded Back Pressure Regulator; 1" Line Size; Stainless Steel Body With Stainless Steel Loading Chamber; M9 Monel M Trim, PTFE Seat, Fluorosilicone Diaphragm, Fluorosilicone Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; Internal Sensing; OPT-55: Cleaned For Oxygen Service Per Cashco Specification S-1134