Model "P3", Two Stage Cylinder Gas Pressure Reducing Regulator; 1/4" Size, Cv'=0.20; 316l SST Body, 316l SST Spring Chamber; 302 SST W/Tefzel Ring Diaphragm,Tfe Seat,316l SST Seat;Retainer,316l SST Poppet,Inconel X-750 Poppet Spring,Port;Configuration "E"; Fnpt End Connection; 2-100 PSIG Range Spring; 0-160 PSIG Outlet Gauge; 0-3000 PSIG Inlet Gauge