Double-yield toner cartridge is designed with a patented, high-efficiency, toner transfer technology for use in the Lexmark T640, T640n, T640dn, T640dtn, T640tn, T642, T642n, T642dtn, T642tn, T644, T644dtn, T644n, and T644tn. This cartridge has a tested yield that more than doubles the stated yield of Lexmark brand cartridges. Cartridge is made using 37 percent post-consumer content by weight and is 100 percent fully recyclable. A pre-paid mailer is included for recycle returns. Packaging is made from 100 percent recycled content. Cartridge yields 60,783 pages.