Frequently Asked Questions

What does one black page actually cost with the GPR-51BK?

Divide the $71.90 price by the rated 19,000-page yield and a black page works out at roughly 0.38 cents in toner. That is the arithmetic that matters on an imageRUNNER doing production copying: at this yield class, toner is one of the smallest line items in a long run, and the GPR-51BK's job is to keep it that way across thousands of pages between changes.

How long does 19,000 pages last in a working copy room?

It depends entirely on throughput, so measure it against your own counter. A machine turning out 500 black pages a day empties this cartridge in about 38 working days; at 1,000 pages a day, roughly 19. Read your monthly meter total, divide 19,000 by it, and you have your real change interval in months — no guessing from the box.

Is the 19,000-page yield a promise?

It is a rating, measured at the industry-standard 5% page coverage — a typical text page. Production work with dense solids, large graphics or heavy black backgrounds covers more of every sheet, so the GPR-51BK will finish sooner on that kind of work. Light text copying can run past the rating. The figure is a comparison standard, not a page counter guarantee.

Is this a genuine Canon cartridge?

No — this is a compatible GPR-51BK, built to match the original cartridge's fit, yield class and output standard at a lower price than the Canon-made version. It is sold under our own name with our own warranty behind it, which is why the returns terms below are ours and not the manufacturer's.

What if output starts streaking or fading halfway through the cartridge?

Tell us. Every compatible cartridge we sell carries a 1-year warranty, and a unit that streaks, fades or leaks well inside its rated life is a warranty conversation, not a cost you absorb. Support is available Monday to Friday, 9 AM to 5 PM CST, and we would rather replace a bad cartridge than have a production machine producing bad copies.

How quickly can a replacement get to us?

We ship from four warehouses — IL, PA, GA and CA — so most orders travel a short leg. If a copy room runs this cartridge dry mid-job, the practical protection is a spare on the shelf; the per-cartridge price drops on the multi-packs of the same GPR-51BK listed alongside this single.

About This Canon GPR-51 Black Cartridge

This is a single compatible Canon GPR-51BK black toner cartridge rated at up to 19,000 pages, made for the black channel of imageRUNNER production and departmental machines that spec the GPR-51 family. At $71.90 it prices black output at about 0.38 cents a page. It is covered by a 1-year warranty and 1-year free returns — the full terms are on our shipping & returns page — and it ships from our IL, PA, GA or CA warehouses. The rest of the GPR range for these machines is on our Canon page.

Alongside it sit the yellow cartridge (GPR-51Y), the magenta cartridge (GPR-51M), the cyan cartridge (GPR-51C), the GPR-51 4-cartridge set and the GPR-51 black 2 pack. On the machine side, this black cartridge (GPR-51BK) serves the ImageRunner Advance C255i, ImageRunner Advance C255iF, ImageRunner Advance C350iF, ImageRunner Advance C355i, ImageRunner Advance C355iF and ImageRunner Advance C250iF.