Model DA5 Rev E Back Pressure Regulator; 3/4" Line Size; Sales Kit A; Stainless Steel Body With Stainless Steel Spring Chamber; M9 Monel M Trim, PTFE Seat, Fluorosilicone Diaphragm, Fluorosilicone Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; OPT-55: Cleaned For Oxygen Service Per Cashco Specification S-1134; Per SPQ 514: With Special Pressure/Temperature Ratings For GOX Service Of 580 PSI At 194F (40 Bar At 90C)