Lexmark T640, T642, T644 High Yield Return Program Print Cartridge . Page yield: 21000 pages, Printing colours: black, Compatible products: Lexmark T640 Lexmark T640dn Lexmark T640dtn Lexmark T640n Lexmark T640tn Lexmark T642. Package weight: 2.4 kg, Package dimensions (WxDxH): 300 x 400 x 162 mm