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