Frequently Asked Questions
What should the first pages look like after I install this cartridge in my B420?
Crisp and fully black within the first page or two. The very first sheet can occasionally look a touch light while toner works its way through the system — that is normal and clears immediately. If page five still looks washed out, reseat the cartridge: lift it out, rock it gently side to side, and set it back in firmly. Persistent lightness after that is worth a call to support.
Walk me through the swap — what are the actual steps?
Open the B420's top cover, grip the old cartridge by its handle and lift it straight out. Unpack the new 43979101, rock it side to side a few times to loosen the toner, pull the protective seal, and lower it into the bay until it seats with a click. Close the cover and print a test page. Start to finish, most people are done in about two minutes, and there are no settings to adjust afterwards.
How many pages will I get, realistically?
The cartridge is rated at up to 3,500 pages at 5% coverage, the standard measurement basis. Everyday letters, invoices and reports sit close to that coverage, so most B420 owners see totals in that neighborhood. Pages packed with dense text or graphics use more toner per sheet and pull the count down — the rating is a yardstick, not a guarantee for every document mix.
What does a page cost with this cartridge?
$27.70 divided by 3,500 pages gives you roughly 0.79 cents per page — about $7.91 per thousand. For a B420 doing general office duty, that is the whole toner story: no other consumable cost hides behind it, and it makes month-to-month print budgeting a simple multiplication.
Streaks appeared on my prints. Is that the cartridge?
Sometimes, sometimes not. A single light band or fading usually points at the toner cartridge — try the rock-and-reseat routine first. Sharp repeating marks at regular intervals down the page more often point elsewhere in the printer. If a fresh cartridge produces the same defect in the same place, the cartridge is not the culprit, and our support team (Monday to Friday, 9 AM to 5 PM CST) can help you sort out what is.
What protection do I get with a compatible cartridge?
The same as with everything we sell: a 1-year warranty and 1-year free returns, spelled out on our shipping & returns page. This is a Clever Supplies compatible made to the 43979101 specification — not an original Oki unit — and orders ship from our warehouses in Illinois, Pennsylvania, Georgia and California.
About This B420 Cartridge
This is the black cartridge for the B420 — the unit Oki numbers 43979101 — in compatible form. The essentials: up to 3,500 pages per cartridge, $27.70 per cartridge, around 0.79 cents per printed page. Installation is a two-minute, tool-free swap, and every unit is backed by a 1-year warranty with 1-year free returns. If your B420 is the office's quiet workhorse, this is the cartridge that keeps it that way. The wider range lives on our Okidata page.
Every printer in the platform — Oki B410dn, MB460, MB470, MB480 MFP and Oki B410 — runs on the 43979101. Around it on the shelf sit the B420 5 pack and the matching 43979001 drum unit.
See Compatible Printers
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