SpecToner Compatible Lexmark T640 T642 T644 (64035H, 64015HA) Toner Cartridge - 21000 prints SpecToner Brand sold exculsively by Specialty Toner and Ink Cartridge Type: Compatible For use in models: Lexmark T640, 640dn, 640dt, 640dtn, 640n, 640rn, 640tn, 642, 642dn, 642dtn, 642n, 642tn, 644, 644dn, 644dtn, 644n, 644tn Print Yield: 21000 prints (5% coverage) Satisfaction Guaranteed for a full year from purchase date.