Genuine Lexmark toner for T640, T640dn, T640dtn, T640n,T642, T642dn, T642dtn, T642n,T644, T644dn, T644dtn, T644n. Creates sharp lines, crisp edges, and smooth shades. Designed to use toner optimally to make your prints look their best. Quick to install, easy to clean, and simple to replace.
Manufacturer's 90 day warranty.