LEXMARK 55B4X00 LXK MS/MX431 RTN 20K Toner Cartridge

Consistently outstanding image quality. Long-life system reliability. Superior sustainability. Innovative shake-free print system.

Unison™ Toner

Essential to Lexmark print system performance, Unison™ Toner's unique formulation consistently delivers outstanding image quality, ensures long-life print system reliability and promotes superior sustainability -- all in an innovative shake-free print system.

High Yield

Maximize your savings and enjoy premium quality with Genuine Lexmark cartridges. High Yield cartridges offer a lower cost per page and contain more pages than Standard Yield cartridges do. Perfect for high volume printing.

Best Together

Genuine Lexmark supplies are engineered to work Best Together with your Lexmark printer, delivering excellent print quality from the first page to the last.

Lexmark Cartridge Collection Program

Going green has never been easier. Recycle all your used Lexmark supplies by letting us take care of the details. It's simple, smart and always free.

Lexmark Return Program Cartridges

Lexmark Return Program cartridges are print cartridges sold at a discount in exchange for the customer's agreement that the cartridges will be used only once and returned only to Lexmark for remanufacturing or recycling. These single-use only cartridges will stop working after reaching end of the rated life established by Lexmark (a variable amount of toner may remain when replacement is required). These cartridges may also automatically update the printer memory to protect the printer from counterfeit and unauthorized products.