Lexmark 64015XA Compatible Toner Cartridge for the T640, T640n, T640tn, T640dn, T640dtn, T642, T642n, T642tn, T642dtn, T644, T644n, T644tn, T644dtn - 32000 pages at 5% coverage per page. Toner Refill Store offers a 100% Guarantee on all of its products. This item is 100% Guaranteed to meet or exceed current OEM standards and comes with a Lifetime Warranty