Kyocera-mita
Compatible Kyocera-Mita TK-421 (TK421) Toner Cartridge Black 4 Pack
- Page Yield:
- Black: 15000
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Page Yield:
- Black: 15000
- Availability:
- In Stock
- Shipping:
- Free Shipping


Kyocera Mita presents the TK421 black toner cartridge, specifically designed for use with the KM 2550 and Copystar CS 2550 printers, ensuring consistent and high-quality printing performance for various documents. With its high yield and efficiency, the TK421 cartridge provides cost-effective printing solutions for offices with moderate to high-volume printing needs. In addition to toner cartridges, toner cartridges are essential for maintaining print quality. The Kyocera Mita TK421 toner cartridge complements the printer's performance, delivering sharp and clear text documents. Whether it's reports, invoices, or letters, the TK421 toner cartridge ensures impressive prints, enhancing overall output quality. Kyocera Mita printers, such as the KM 2550 and Copystar CS 2550 models, are known for their durability and efficiency in office environments. With features like duplex printing and network connectivity, these printers offer convenience and reliability, ensuring smooth printing operations. In conclusion, Kyocera Mita printers paired with TK421 toner and toner cartridges provide reliable and high-quality printing solutions for offices. Whether it's black and white documents or colorful prints, the KM and CS series ensure consistent and professional results, making them a trusted choice for users seeking dependable printing solutions.
Four identical TK421 black cartridges for the KM 2550, each sealed in its own packaging. It is a reserve quantity — the kind of stock a facilities or office manager orders once and then stops thinking about for a good while.
High-volume copying environments: busy departments, schools, service bureaus and anywhere the copier's output is measured in reams. The heavier the daily load, the more a planned reserve beats one-at-a-time ordering, because the machine never waits for toner to arrive.
Mark each box with its arrival month and always fit the oldest first. That first-in, first-out order keeps every cartridge moving through in turn, and the shrinking line on the shelf doubles as a visual reorder reminder.
Yes — every TK421 here is the full-capacity cartridge, rated at 15,000 pages at 5% coverage. Pack size has no bearing on yield; the first cartridge out of the box and the last one perform identically.
Keep the boxes sealed, flat, and in a cool, dry room away from direct sun and heat sources. Under those ordinary conditions the cartridges wait patiently — no climate-controlled storage or special handling is expected.
The 1-year warranty and 1-year free returns apply to each cartridge individually. A problem with one unit is resolved on its own; our shipping & returns page sets out how to start that process.
Four cartridges at $272.10 works out to $68.03 per TK421 — less per unit than the same cartridge bought in a pair or singly. The reserve holds 60,000 rated pages in total, so the running cost across the pack is about 0.45 cents per page at standard 5% coverage. For a facilities budget, that single figure prices every page the KM 2550 produces until the shelf is empty.
Measure the machine first: take the KM 2550's monthly page count from its counter for a typical month. At 3,000 pages a month, each 15,000-page cartridge lasts about five months and the four-pack covers close to twenty. At 6,000 a month those figures halve. The reserve does not change the arithmetic, it just stretches it — one order quietly covers a long, predictable run of copying.
Swap first and investigate second. Take the next oldest sealed TK421 from the reserve — the rotation order you marked on arrival — and fit it; the change takes minutes and the copying queue clears. Then look at the removed unit: if a gentle rock and a refit restore it in a quiet moment, it was settling, not failure. A cartridge that stays pale goes to us under its individual cover.
Give them a home: a designated carton near the machine, into which each spent TK421 goes inside the packaging its replacement came in. Empties collected that way leave in one batch for recycling or disposal instead of dribbling into general waste all month. Keep any unit that failed early out of that carton until its claim is settled — it needs to stay identifiable as an individual case.
At $272.10, this is four compatible TK421 black cartridges for the KM 2550, each rated at 15,000 pages. For a copier that anchors a department's document flow, the pack turns toner from a recurring errand into a scheduled, budgeted supply.
Dispatch is from our IL, PA, GA and CA warehouses, and the support desk is staffed Mon–Fri, 9 AM–5 PM CST. The rest of the Kyocera-Mita range is available in the store for any other machines on site.