Lexmark 55B1X00 Unison Original Toner Cartridge Black Extra High Yield 20000 Pages

Extra High Yield Black Toner

The Lexmark 55B1X00 is an original Unison toner cartridge rated for 20,000 pages at five percent coverage. It fits the MS431dn, MS431dw, MX431adn and MX431adw laser printers and is supplied new as part of the Lexmark Return Program.

Shake-free print system reliability

The cartridge uses Lexmark's shake-free print system to maintain consistent output during long print runs without the density fluctuations that can appear in short bursts. Its Unison formulation is engineered for long-life system reliability so sustained workloads stay sharp from the first page to the last.

Return Program single-use constraint

This cartridge is sold under the Lexmark Return Program, which requires the customer to use it once and return the empty unit to Lexmark for recycling or remanufacturing. The licence does not permit refilling or third-party reuse, so buyers who need a cartridge they can keep or refill should choose a different SKU.