Model SLR-1 Rev A Pressure Reducing Regulator With Self-Relieving Loader; 1-1/2" Line Size; Sales Kit A; Carbon Steel Body, Ductile Iron Loading Chamber; P2 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, Neoprene Diaphragm, BUNA-N Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal