Model DA1 Rev E Pressure Reducing Regulator; 1" Line Size; Sales Kit A; Stainless Steel Body With Stainless Steel Spring Chamber; P1 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, Neoprene Diaphragm, BUNA-N Static Seal, Neoprene O-Ring Dynamic Seal