Model 1465 Rev A Pressure Reducing Regulator; 1/4" Size, 0.156" Orifice; Stainless Steel Body With Stainless Steel Spring Chamber; S1 Trim: 316 Stainless Steel With Stellite Seat, 302 SST Diaphragm; NPT End Connections; 180-300 PSIG Range Spring (Includes OPT-80: High Outlet Pressure Construction)