Model DA1 Rev E Pressure Reducing Regulator; 1/2" Line Size; Carbon Steel Body With Carbon Steel Spring Chamber; P9 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, PTFE Seat, Fluorosilicone Diaphragm, Fluorosilicone Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; 1-5 PSIG Range Spring; Internal Sensing