Lexmark T640, T642, T644 High Yield Print Cartridge . Page yield: 21000 pages, Compatible products: Lexmark T640 Lexmark T640dn Lexmark T640dtn Lexmark T640n Lexmark T640tn Lexmark T642, Printing colours: Black. Package weight: 2.4 kg, Package dimensions (WxDxH): 300 x 400 x 162 mm, Package dimensions (W x D x H): 300.2 x 400 x 162.1 mm (11.82 x 15.75 x 6.38")