1. Printer Ink
  2. Ink Cartridges
  3. HP 21 Black Ink Cartridge

HP 21 Black Ink Cartridge (C9351AE)

£22.09 & FREE UK Delivery
In Stock
0 in basket
Multi-buy discount
2 - 3 £21.32 each
4+ £20.54 each
£22.09 (£18.41 ex VAT)
with FREE UK Delivery

Free, Fast Delivery

Orders go by Royal Mail post, normally taking 1-2 days and guaranteed to arrive within 5 working days.

Need It Faster?

Select "Next Day" at the checkout for a guaranteed next-working-day service (morning delivery also available).

(Some orders may be sent by courier depending on availability.)

In Stock
  • A original black HP ink cartridge for your printer
  • GUARANTEED to work in your HP F2280, HP F2180, HP 4625 , and more - see all printers
  • 100% MONEY BACK GUARANTEE up to 12 months after receiving your order
  • QUALITY PRODUCT - manufactured by HP for the best performance possible in your printer
  • HP SILVER PARTNER - we are an approved HP partner, providing only the best genuine and replacement HP products
See more product details

This ink cartridge is guaranteed to work in the following HP printers:

View all printers

Frequently Bought Together

HP 21 Black Ink Cartridge
HP 22 Colour Ink Cartridge
Combined Price: £41.84 inc VAT
    1. £22.09 inc VAT
    2. £27.22 inc VAT

Product Description

This is an original HP 21 Black Ink Cartridge.

Designed for families and personal users who are looking for an affordably priced printing solution to satisfy modest printing needs .

Containing pigmented black inks, this C9351AE cartridge provides crisp sharp text for your letters and reports.

This cartridge contains 5ml of black ink and enjoys free delivery and our 12-month guarantee.


Capacity 5ml of ink
Page Yield 190 pages
Running Cost 11.63p per page

Running Cost

This value is calculated from manufacturer's estimates of how many pages a cartridge will print, and should only be used to compare cartridge running costs.

Page yields are estimated using the ISO standard of 5% coverage on a plain A4 page, which is roughly the length of a short letter.

GTIN 00050507470622
Colour Black
Compatibility HP Original
Range HP 21 ink cartridge range
Brand HP
Condition New

Customer Reviews

Customer reviews for the HP 21 Black Ink Cartridge

5 star
4 star
3 star
2 star
1 star
Average customer rating
(5 reviews)

Very good product ad quick delivery . All perfect !


Great price and positive experience - as always !


Easy to order with, good product, simple payment, fantastic follow up after sales. Would like a cheap next day option on royal mail for when I Have run out. Definitely continue to purchase with.


Everything fine as I would have expected from an original brand cartridge. No problem with service either. Prompt delivery only screwed up by post office.


HP 21 Black Ink. These cartridges are always reliable, and always print well. Have used them for 5 or more years now, and very pleased with them.

Customer Questions & Answers

Something stopping you buying this product? Ask and we shall answer.

Responses are typically ~10 minutes between 9am and 5pm, weekdays.

Ask a question about this product
No matching questions were found.

Officially the UK's #1 Printer Cartridge Retailer

We're voted the #1 Printer Cartridge provider by TrustPilot users, with the most reviews and the highest average rating for all suppliers. At Stinkyink you'll enjoy the best prices and most reliable product quality, that's why we've shipped over 3 million cartridges to 200,000+ customers. Just read some of our amazing recent reviews.