Model DA1 Rev E Pressure Reducing Regulator; 3" Line Size; Sales Kit A; Ductile Iron Body With Ductile Iron Spring Chamber; P5 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, BUNA-N Diaphragm, BUNA-N Static Seal, BUNA-N O-Ring Dynamic Seal;