Model DA4 Rev E Pressure Loaded Reducing Regulator; 1-1/2" Line Size; Sales Kit A; Carbon Steel Body With Carbon Steel Loading Chamber; P3 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, CTFE Seat, Neoprene Diaphragm, BUNA-N Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal