Print confidently with Brother Genuine TN635BK Standard Yield Black Toner Cartridges. Expertly engineered, Brother Genuine is the only toner brand recommended for Brother Business Color Laser Printers. With the reassurance of dependable compatibility, this cartridge produces sharp, precise results and delivers yields up to 3,000 pagesWork with HL-L8430CDW, HL-L8430CDWT, HL-L8570CDW, MFC-L8730CDW, MFC-L8930CDW, MFC-L8970CDW, and MFC-EX575
Frequently Asked Questions
Straight question: does this 2 pack actually save money?
Honestly — no, and we would rather say so. Two single TN635BK cartridges bought separately cost $108.79 each, $217.58 the pair. This factory 2 pack is $218.78, which is $1.20 more, not less. What you are paying the small premium for is the convenience of one box, one order and one delivery with a spare already on the shelf. If price is the only consideration, buy the singles; if keeping a backup in the cupboard matters, this pack does that job.
Why keep a spare black cartridge on the shelf at all?
Because black is the cartridge that stops the office. These printers run through black faster than any color — the standard TN635BK is rated at 3,000 pages — and an empty black halts invoices, labels and letters alike. A second cartridge in storage converts a two-day wait for a delivery into a two-minute swap, which is the entire logic of a 2 pack like this one.
How should the spare cartridge be stored?
Sealed in its original packaging, flat, at room temperature and out of direct sunlight. Kept that way, a genuine Brother cartridge sits happily on a shelf for an extended period and prints at full quality when its turn comes. Avoid attics, garages and anywhere that swings between hot and cold, and do not open the bag early — the seal is what keeps the toner fresh.
When would the high-yield black make more sense than this pack?
When your priority is cost per page rather than a spare on the shelf. One TN635XLBK gives 5,500 pages for $139.49 — about 2.5 cents a page against the standard cartridge's roughly 3.6 cents — so two XL cartridges cover 11,000 pages at a much lower running cost than the 6,000 pages in this box. Heavy black printing belongs in the XL or XXL tier; this pack suits lighter use with a backup.
What if one of the two cartridges turns out to be faulty?
It is covered. Genuine Brother products bought from us can be returned within 30 days of delivery in every case, and after that window Brother's manufacturer warranty stands behind the cartridges. The returns process is described on our shipping & returns page, and support is available between 9 AM and 5 PM CST, Monday to Friday.
About This Brother TN635BK 2 Pack
This is Brother's factory 2 pack of genuine TN635BK standard-yield black cartridges — two cartridges, 3,000 rated pages each, 6,000 pages in total — for the HL-L8430CDW, HL-L8570CDW and MFC-L8970CDW family. It is priced at $218.78 against a $328.17 list price. We dispatch from Illinois, Pennsylvania, Georgia or California. Singles, colors and the higher-yield versions of this cartridge are all listed on our Brother brand page.
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