Model DA5 Rev E Back Pressure Regulator; 3/4" Line Size; Ductile Iron Body With Ductile Iron Spring Chamber; P6 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, BUNA-N Diaphragm, BUNA-N Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; 20-80 PSIG Range Spring; Internal Sensing