Model 1000LP Rev A Pressure Reducing Regulator, PTFE/Al-Silicate Gaskets; 1" Line Size, Gaseous Jet; Stainless Steel Body With Stainless Steel Spring Chamber; S3 Trim: 316 Stainless Steel Cylinder, 316 Stainless Steel Plug With PTFE Seat, Neoprene (BC) Diaphragm; NPT End Connections; 1-5 PSIG Range Spring