Frequently Asked Questions

Why would I buy the 2-pack instead of a single cartridge?

The idea is simple: one TK3112 goes into the FS-4100DN today, and the second stays sealed on the shelf as an instant spare. When the installed unit finally runs out — often mid-job — the swap takes two minutes instead of turning into a rush order. At $54.17 for the pair, it is insurance against the one day you cannot afford a dead printer.

Are the two cartridges in this pack identical?

Yes. Both are the same TK3112 black cartridge, each individually sealed and each rated at 15,500 pages. Either one fits the same machine, in any order — there is no "first" and "second" unit.

How should I keep the spare cartridge while it waits?

Store it sealed, flat, and indoors at normal room temperature, out of direct sunlight and away from heaters. Kept that way, a sealed cartridge waits patiently for a long time and prints normally when its turn comes.

Can I split this pack between two locations?

Certainly. Because each unit is sealed on its own, you can leave one at the office and send the other to a satellite desk or home workstation that runs the same model — nothing ties the pair to a single site.

If one cartridge in the pack turns out faulty, must I return both?

No. Coverage is handled per unit. The working cartridge stays in service, and only the problem cartridge is dealt with under the 1-year warranty and 1-year free returns that cover every cartridge we sell.

When should I reorder once I open the spare?

The day the shelf spare goes into the machine is the practical reorder point. Orders placed then ship from whichever of our IL, PA, GA or CA warehouses is closest, so a fresh spare usually arrives long before the installed cartridge is anywhere near empty. Delivery and returns details are on our shipping and returns page.

What does the 2-pack work out at per printed page?

At $54.17 for two cartridges rated at 15,500 pages apiece, the pair covers 31,000 pages, putting toner cost at roughly 0.17 cents a page at standard coverage. That is the quiet arithmetic behind the TK3112 2-pack: the spare on the shelf is not a luxury, it is bought at a lower per-page rate than two separate single orders.

How does keeping a pair change my ordering rhythm?

It stretches it. Instead of ordering in reaction to an empty printer, you order in reaction to an empty shelf — a calmer trigger with a whole cartridge still working in the FS-4100DN. For most small offices that turns toner buying into a twice-a-year habit rather than a recurring interruption, and each order is a single two-cartridge pack.

How do I keep track of which cartridge of the pair is in the machine?

Write the fitting date on the installed unit's box and keep that box until the cartridge comes out. When the spare is fitted, its box takes the same place. That tiny paper trail tells you at a glance how long each TK3112 lasted, and comparing the two dates against the page counter shows whether your volume is creeping up.

What should I do with the two empties once both are used?

Box each spent cartridge in the packaging that held its replacement, so residual toner stays sealed inside. The pair can then go together to an office-supply recycling drop-off or an e-waste collection. Sending empties through a recycling stream keeps the plastic and metal in use and keeps toner dust out of ordinary office waste bins.

About This 2-Pack

This is a two-cartridge pack of compatible Kyocera-Mita TK3112 black toner for the FS-4100DN, priced at $54.17. It is built around a one-in-use, one-in-reserve rhythm: no stockroom system, no planning spreadsheet — just a sealed backup within arm's reach the moment the printer stops. Each cartridge is rated at 15,500 pages and backed by a 1-year warranty with free returns for the same year.