Model "P1", Single Stage Pressure Reducing Regulator; 1/2" 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 "A; FNPT End Connection; 3-250 PSIG Range Spring; No Outlet Gauge; No Inlet Gauge; Black Knob