Lexmark OEM Lexmark T642 500 Sheet Duplex UnitCompatibility:Lexmark T642,Lexmark T642DN,Lexmark T642DTN,Lexmark T642N,Lexmark T642TNLexmark T642 500 Sheet Duplex UnitLexmark, LEX, 56P4102, DPI Lexmark Refurbished T642 500 Sheet Duplex Unit, Outright,Accessory;Brand: Lexmark