SKU:

CS-Lexmark-MS321DN-MS521DN-BK

Printer Brand:

Lexmark

OEM Number:

56F1000

Ink Color:

Black

Page Yield:

Black: 6000

Printer Type:

Laser Cartridge

Condition:

New Compatible

Frequently Asked Questions

How long will this cartridge actually last in a small office?

At a typical small-office pace of about 500 pages a month, the rated 6,000 pages work out to roughly a year of printing. A busier desk printing 1,000 pages a month will see about six months. Your calendar life depends on volume, not on the printer sitting idle — an installed cartridge does not drain while the machine is off.

What does the 6,000-page rating assume about my documents?

The rating follows the industry standard of 5% page coverage — roughly a page of ordinary business text. Dense reports, forms with heavy headers, and graphics-rich pages use more toner per sheet, so a cartridge can finish well before 6,000 pages if your output leans that way. Light text-only printing can stretch past the rating.

Which printers does this cartridge fit?

This listing names the Lexmark MS521dn, and the cartridge is made for that machine — but it is the standard 56F1000 cartridge for the whole platform, so it also fits MS321DN, MS421DN, MS421DW, MS521DN, MS621DN, MX321ADN, MX521ADE and MX521DE. If your model is on that list, this is the right cartridge even though the listing title only calls out the MS521dn.

How will I know when it is time to order the next one?

The printer warns you with a low-toner message on its display and in the embedded web page long before pages start to fade. Treat that warning as your order trigger: order then, and the fresh cartridge will be on hand before the old one actually runs dry.

What if the cartridge arrives with a defect?

Every cartridge we sell is covered by a one-year warranty, and returns are free for a full year after purchase. If this cartridge underperforms or fails early, contact us and we will make it right under the terms on our shipping and returns page.

Can I squeeze extra pages out of it at the end?

When prints first start looking light, remove the cartridge and rock it gently side to side a few times to redistribute the remaining toner, then reinstall it. That usually recovers a worthwhile number of extra pages. It is a short grace period, though — use it to get your replacement ordered, not as a long-term fix.

About This Lexmark 56F1000 Cartridge for the MS521dn

This compatible Lexmark 56F1000 black toner cartridge is rated for 6,000 pages and priced at $174.94 — a straightforward one-year supply for a lightly used MS521dn in a small office or home workspace. It is backed by a one-year warranty with one-year free returns from Clever Supplies, and support is available Monday through Friday, 9 AM to 5 PM CST. Browse the wider range on our Lexmark toner page.