Do it Wiser Compatible 50F1U00 501U Toner for Lexmark MS610dn MS610 MS510 MS510dn MS610de MS610dtn MS610dte | Ultra High Yield 20,000 Pages Estimated page yield: 20,000 pages (depends on printer and usage) Compatible with part number: Lexmark 50F1U00 | Lexmark 501U Compatible printer models: Lexmark MS510dn, Lexmark MS610dn, Lexmark MS610de, Lexmark MS610dtn, Lexmark MS610dte Our Do It Wiser smart toner cartridges are covered by a 1 year warranty against defects Cartridges certified to work | ISO 9001 quality assurance | ISO 14001 environmental management | RoHS Lead Free 1 Black20,000pages Lexmark MS510dn Lexmark MS610dn Lexmark MS610de Lexmark MS610dtn Lexmark MS610dte