Model 1465 Rev A Pressure Reducing Regulator; 1/4" Size, 0.109" Orifice; Stainless Steel Body With Stainless Steel Spring Chamber; S40M Trim: 316 Stainless Steel With Stellite Seat, Elgiloy Diaphragm; NPT End Connections; 360-500 PSIG Range Spring (Includes OPT-80: High Outlet Pressure Construction); OPT-40SST: Construction Per Nace Standard MR0175