Model DA4 Rev E Pressure Loaded Reducing Regulator; 3" Line Size; Sales Kit A; Stainless Steel Body With Stainless Steel Loading Chamber; S7 316L Stainless Steel Trim, Polyurethane Seat, Fluorosilicone Diaphragm, Fluorosilicone Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal;