HP OfficeJet Pro 6978 Ink Cartridges

Castle Ink sells remanufactured ink cartridges for the OfficeJet Pro 6978. The OfficeJet Pro 6978 uses four HP 902 cartridges: black, cyan, magenta and yellow, which you replace one color at a time. The extra-high-yield HP 906XL black also fits. Each cartridge is a remanufactured original shell, refilled and tested in the U.S. Orders placed by 4 PM ET ship the same business day, shipping is free over $50, and every cartridge is covered by our 1-year 100% satisfaction guarantee.

Tip: turn off automatic HP firmware updates before installing third-party cartridges so an update can't block them later (here's how). Where we list both “OEM Chip” and “New Chip” versions, the OEM Chip version is the one to try first. Printing checks? Choose the MICR black version.

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HP OfficeJet Pro 6978 Ink: Common Questions

Which ink cartridges does the OfficeJet Pro 6978 use?

The OfficeJet Pro 6978 uses four HP 902 cartridges: black, cyan, magenta and yellow, which you replace one color at a time. The extra-high-yield HP 906XL black also fits.

Will remanufactured ink work in my OfficeJet Pro 6978?

Yes. Turn off automatic firmware updates (and HP's Cartridge Protection setting, if your printer has it) before installing, so an update can't block third-party cartridges. If a cartridge from us still isn't recognized, contact us and we'll replace or refund it under our 1-year guarantee.

Standard or XL: which should I buy?

XL in almost every case. The XL cartridges are the same physical size and fit the same slot, but hold more ink, so each printed page costs less. Standard cartridges only make sense if you print very rarely, since ink can dry out over long idle periods.

More help: What ink does the OfficeJet Pro 6978 use? · All HP ink cartridges · Find Ink by Printer. Updated October 2026 by William Elward, founder of Castle Ink (in business since 2005).