Fuser maintenance kit is a genuine Lexmark part designed especially for use with Lexmark T640/dn/dtn/n/rn/tn, T642/dtn/n/tn, T644/dn/dtn/n/tn, X642e, X644e, X646dte/e/ef, and XM642e monochrome laser printers to assure quality. The 110-127V kit yields 300,000 pages.