Model "P1", Single Stage Pressure Reducing Regulator; 3/8" Size, Cv'=0.20; 316l SST Body, 316l SST Spring Chamber; 302 SST W/Tefzel Ring Diaphragm,Pctfe Seat,316l SST Seat;Retainer,316l SST Poppet,Inconel X-750 Poppet Spring,Port;Configuration "A"; Fnpt End Connection; 2-100 PSIG Range Spring; No Outlet Gauge; No Inlet Gauge; Black Knob