Page Yield*: 2500 pages Compatible with Lexmark 601 Lexmark-601 Lexmark 601A Lexmark-601A Laser black (per cartridge) *at 5% coverage (ISO/IEC standard) Package Contents: 2 x Lexmark 601A black compatible toner cartridges Lexmark 601 Lexmark-601 Lexmark 601A Lexmark-601A Compatible with: Lexmark MX printers: MX310dn, MX410de, MX510de, MX511de, MX511dhe, MX511dte, MX610de, MX611de, MX611dhe, and MX611dte LD Products: Lexmark 601A black toner cartridge pack compatible replacement for Lexmark 601 Lexmark-601 Lexmark 601A Lexmark-601A Professional compatible replacements manufactured by LD Products. Lexmark is a registered trademark of Lexmark and is not affiliated with and does not endorse LD Products.