Lexmark OEM Lexmark T640 Toner Sensor AssemblyCompatibility:Lexmark T640,Lexmark T640DN,Lexmark T640DTN,Lexmark T640N,Lexmark T640RN,Lexmark T640TNLexmark T640 Toner Sensor AssemblyLexmark, LEX, 40X0036, Lexmark T640 Toner Sensor Assembly, Printer Part;Brand: Lexmark