581X
Compatible Lexmark 581X Black High Yield Toner Cartridge (58D1X00)
35,000 pages
$299.99
Save 1% vs genuine
Lexmark MX721 toner
Your MX721 takes the 581X (high yield). At our price that is about 0.9¢ a page.
The Lexmark MX721 is a mono laser printer in the MX721 series, which shares cartridges across 3 models.
The cartridge it takes is the 581X, rated by Lexmark at about 35,000 pages, which works out to roughly 0.9¢ a page at our price of $299.99.
When you compare prices, compare cost per page rather than the sticker price: a cheaper cartridge with half the rated yield costs more to run. Every cartridge here ships free, is covered by our printer damage protection and can be returned within 90 days, opened or not.
Cartridges that fit
What it costs you a month
About $9.66 a month in toner, roughly one 581X every 3 months.
Questions about the MX721
What toner does the Lexmark MX721 use?
The 581X. Lexmark lists this cartridge as compatible with this model, and the yields on this page are Lexmark's published figures.
Does using a compatible cartridge void the MX721 warranty?
No. Under the Magnuson-Moss Warranty Act a manufacturer cannot void your warranty because you used a third-party cartridge. If one of ours damages the printer, our printer damage protection covers the repair.
Other Lexmark MX721 models
Most of these share the same cartridges. Check the model page to be sure.
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Page updated Sep 22, 2026. Compatibility checked by Dan Whitaker, Print Technician. Brand names and part numbers are used only to identify compatibility. We are not affiliated with or endorsed by any printer manufacturer.