Model DA1 Rev E Pressure Reducing Regulator; 1/2" Line Size; Ductile Iron Body With Ductile Iron Spring Chamber; PA 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, Fluorocarbon Diaphragm, Fluorocarbon Static Seal, Fluorocarbon O-Ring Dynamic Seal; NPT End Connections; 1-5 PSIG Range Spring; Internal Sensing