Introducing our low-cost compatible HP 21XL black ink cartridge —a budget-friendly solution without compromising quality. This compatible HP 21XL high capacity black printer ink prints approx 475 pages.

Manufactured to the highest standards, our compatible black HP 21 ink cartridge guarantees the same quality of prints and the same quantity of prints as the original version, providing exceptional prints every time.

Choosing our compatible HP C9351CE black ink over OEM means substantial savings without compromising performance. We are committed to offering the lowest online prices, ensuring you get the best value compatible HP 21XL black printer cartridge for your printing needs, we promise unmatched affordability without compromising on performance. Experience high-quality printing without the hefty price tag.

Rest easy with our no-risk purchase—our compatible HP C9351CE cartridge comes with a full 12-month guarantee. Plus, by law, using compatible HP 21 ink won't invalidate your printer warranty, providing peace of mind.

Order HP 21XL black compatible ink cartridges before our specified deadline for next working day delivery. For detailed information on our order cut-off times, please check our delivery information page. 


Upgrade your printing experience with cost-effective and high-quality premium compatible HP 21 XL black ink-jet cartridges from The Cartridge Centre.

Ever wonder why printer manufacturers are so keen on firmware updates? They say it's to enhance printing speed, fix bugs, and ensure smoother operation. However, there's more to it than just improving your experience. Printer manufacturers release these updates to control your printing options and influence your purchasing decisions, it's no secret printer manufacturers make most of their profit from selling their own branded ink cartridges.

Just as your mobile phone or computer receives updates, printers also need periodic updates. While it's usually a no-brainer to update your phone or computer, you might want to think twice before updating your printer. These updates can render compatible cartridges useless, forcing you to buy their costly branded ones.

To safeguard your printing experience, disable automatic firmware updates in your printer’s settings. This will help prevent any disruptions.

By choosing to opt out of firmware updates, you can maintain the ability to use cost-effective compatible cartridges, avoiding the higher costs of branded ones. Remain alert for update notifications and decline them to preserve your options.

Since each printer varies, it's always advisable to consult your specific printer manual on how to disable firmware updates.

Can compatible HP 21XL black ink cartridges dry out?

Eventually all compatible HP 21XL ink cartridges will dry out. To ensure the longest life for your HP C9351CE printer ink, leave the cartridges in their sealed packaging until needed and try not to go long periods without printing.

Will this HP 21XL compatible black ink cartridge work in my printer?

Click here to find out which printers this item is compatible with.

Where can I buy cheap HP 21 XL ink?

At The Cartridge Centre, we take pride in providing budget-friendly solutions for your printing needs. Our low-cost HP 21XL black compatible cartridges are designed to deliver the same exceptional results as the OEM version, ensuring quality prints at a fraction of the cost. We are committed to offering you the most competitive prices online, promising unmatched affordability without compromising on performance. Trust The Cartridge Centre for reliable, cost-effective alternatives that guarantee a seamless printing experience while maximizing your savings.

How many pages does HP C9351CE ink print?

Prints approx 475 pages @ 5% coverage.