FREE next-day delivery on everything
Order now to receive on Thursday

Delivery Options

TimescaleMethodCharge
Free next-day 98% of orders arrive the next working day Royal Mail 1st class * FREE
Guaranteed next-day Guaranteed to arrive on the next working day

Guaranteed next-day

In the extremely unlikely event that the courier does not attempt delivery on the next working day, you will be given:

- A 10% refund of the total order value

- A refund of £2.95 next-day courier charge

- A further voucher giving you 10% off your next order

Guaranteed next-day

In the extremely unlikely event that the courier does not attempt delivery on the next working day, you will be given:

- A 10% refund of the total order value

- A refund of £2.95 next-day courier charge

- A further voucher giving you 10% off your next order

Courier £2.95
Guaranteed pre-12 Guaranteed to arrive before 12 noon on the next working day

Guaranteed pre-12

In the extremely unlikely event that the courier does not attempt delivery before 12 noon on the next working day, you will be given:

- A 10% refund of the total order value

- A refund of £7.95 pre-12 courier charge

- A further voucher giving you 10% off your next order

Guaranteed pre-12

In the extremely unlikely event that the courier does not attempt delivery before 12 noon on the next working day, you will be given:

- A 10% refund of the total order value

- A refund of £7.95 pre-12 courier charge

- A further voucher giving you 10% off your next order

Courier £7.95

* Depending on size and value, some orders may be upgraded from Royal Mail to Courier.

Delivery Schedule

Order placedExpect to receive
Monday, before 5:15pm Next day (Tuesday)
Tuesday, before 5:15pm Next day (Wednesday)
Wednesday, before 5:15pm Next day (Thursday)
Thursday, before 5:15pm Next day (Friday)
Friday, before 5:15pm Monday
Saturday or Sunday Tuesday

Bank holidays

We do not despatch or deliver orders on bank holidays

Highlands and Islands

Deliveries may take 2 to 3 days longer to arrive

International deliveries

We only deliver to addresses within the UK.

Lowest online price guaranteed
We beat or match all other retailers
Lowest price guaranteed
and FREE next-day delivery

Lowest online price guaranteed

If within 7 days of your purchase you find the same product (brand and model) being offered online at a lower price, we will refund 100% of the difference. For further info, click here.

Lowest online price guaranteed

To claim against our low price guarantee simply contact us and include the following information:

  • Your full name, postal address, email address and order number
  • The product code of the item you found cheaper on a competitor's site
  • The exact page on the competitors website where you found the product cheaper

Our low price guarantee applies only to products available from online UK retailers. It excludes products that are not new and immediately available, online promotions such as special, bonus or free offers that are not at everyday prices and products which are sold under different terms and conditions, such as special financing, contract pricing or volume discount pricing.

Basically, the identical items must be in stock and ready for immediate dispatch on another VAT registered UK mainland based website.

Free next-day delivery

Our free delivery option typically uses Royal Mail first class. In 98% of cases, orders placed on Monday to Friday before 5:15pm will arrive on the next working day. To see other delivery options and our delivery schedule click here.

Delivery Schedule

Orders placed before 5:15pm on Monday to Thursday - receive next day

Orders placed before 5:15pm on Friday - receive on Monday

Orders placed on Saturday or Sunday - receive on Tuesday

Delivery Options

Free next-day

98% of orders arrive the next working day. Typically uses Royal Mail 1st class, though some orders may be upgraded to courier.

Guaranteed next-day (£2.95)

Uses courier. In the extremely unlikely event that delivery isn't attempted on the next working day, you will be given:

  • A 10% refund of the total order value
  • A refund of £2.95 courier charge
  • A further voucher giving you a further 10% off your next order

Guaranteed pre-12 (£7.95)

Uses courier. In the extremely unlikely event that delivery isn't attempted before 12 noon on the next working day, you will be given:

  • A 10% refund of the total order value
  • A refund of £7.95 courier charge
  • A further voucher giving you a further 10% off your next order

12 month warranty on everything

If within a year of purchase you happen to experience any quality problem, we'll happily provide a replacement, or a full refund.

Free returns

Whatever the reason for returning items to Cartridge Save, you will never pay a penny for postage.

Lowest online price guaranteed

We pride ourselves in giving our customers the best possible value for money. To ensure you are not out of pocket, we will refund 100% of the difference, if within 7 days of your purchase you find the same product (brand and model) being offered online at a lower price.

To claim against our low price guarantee simply contact us and include the following information:

  • Your full name, postal address, email address and order number
  • The product code of the item you found cheaper on a competitor's site
  • The exact page on the competitors website where you found the product cheaper

Our low price guarantee applies only to products available from online UK retailers. It excludes products that are not new and immediately available, online promotions such as special, bonus or free offers that are not at everyday prices and products which are sold under different terms and conditions, such as special financing, contract pricing or volume discount pricing.

Basically, the identical items must be in stock and ready for immediate dispatch on another VAT registered UK mainland based website.

Genuine Black HP 21 Ink Cartridge - (C9351AE / HP 21 Cartridge)

97.2%
50 reviews

Average Customer Review:

  1. 5 Star 44
  2. 4 Star 5
  3. 3 Star 1
  4. 2 Star 0
  5. 1 Star 0
See all 50 reviews
| 5 answered questions
Genuine Black HP 21 Ink Cartridge - (C9351AE / HP 21 Cartridge)
9.4p per page (1 pack) 9.4p per page Pack of 1 toner cartridges

For most cartridges this is based on 5% coverage on A4 paper. These numbers are based on manufacturer quoted values and are for comparison purposes only.

190 pages
5ml

Pack Contains:

Black - 190 pages
5ml

For most cartridges this is based on 5% coverage on A4 paper. These numbers are based on manufacturer quoted values and are for comparison purposes only.

£17.93 (£21.52 inc VAT)

FREE next-day delivery

Multi-buy discount
  • Buy more, save money
  • 2 £16.70 (£20.04 inc VAT)
  • 3+ £16.21 (£19.45 inc VAT)
9.4p per page (1 pack) 9.4p per page Pack of 1 toner cartridges

For most cartridges this is based on 5% coverage on A4 paper. These numbers are based on manufacturer quoted values and are for comparison purposes only.

190 pages
5ml

Pack Contains:

Black - 190 pages
5ml

For most cartridges this is based on 5% coverage on A4 paper. These numbers are based on manufacturer quoted values and are for comparison purposes only.

  • 97.2%
    50 reviews

    Average Customer Review:

    1. 5 Star 44
    2. 4 Star 5
    3. 3 Star 1
    4. 2 Star 0
    5. 1 Star 0
    See all 50 reviews
    | 5 answered questions
  • Lowest online price guaranteed

    If within 7 days of buying a product from us, you find the same product cheaper at any other UK online store, we will refund you with 100% of the difference.

  • Lowest online price guaranteed

    If within 7 days of buying a product from us, you find the same product cheaper at any other UK online store, we will refund you with 100% of the difference.

  • 12 month guarantee and FREE returns

    If within a year of purchase you happen to experience any quality problem, we'll happily provide a replacement, or a full refund.

    Whatever the reason for returning items to cartridgesave.co.uk, you will never pay a penny for postage.

  • 12 month guarantee and FREE returns

    If within a year of purchase you happen to experience any quality problem, we'll happily provide a replacement, or a full refund.

    Whatever the reason for returning items to cartridgesave.co.uk, you will never pay a penny for postage.

  • HP Gold Partner

    Gold Partner Certificate
  • Will this item work in my printer?
9.4p per page

For most cartridges this is based on 5% coverage on A4 paper. These numbers are based on manufacturer quoted values and are for comparison purposes only.

190 pages
5ml
  • 190 pages
  • 5ml
Cartridge Save brand 12 month guarantee

Cartridge Save premium
recycled toner cartridges

Made using recycled Canon cartridges, these cartridges are a direct replacement for the Canon versions, and are guaranteed to produce high-quality prints.

12 month guaranteed

If within a year of purchase you happen to experience any quality problem with anything you buy from Cartrige Save, we'll happily provide a replacement or full refund.

Free returns

Whatever the reason for returning items to cartridgesave.co.uk, you will never pay a penny for postage.

Product Description

Product Description

Genuine Black HP 21 Ink Cartridge

The genuine black HP 21 ink cartridge is an affordable and reliable product for printing sharp and crisp text documents, as well as monochrome graphics with the most distinctive detail. The pigmented formulation of the HP C9351A black ink allows it to adhere easily to plain paper, so bleeding and smudging is minimised and outputs last for year without fading. The HP 21 ink cartridge can be used for printing on different speciality paper like glossy sheets and special media for flexibility in the ways you can display your printing outputs. The HP C9351A ink unit is just right for the needs of a small office or home users with it being able to produce an estimated 190 pages of high quality print.


Buy Cheap Black HP C9351A Ink At Cartridge Save

Free delivery makes our black HP C9351A printer ink cheaper than what other online retailers are selling. Buy a new HP 21 ink cartridge from our secure website using any major card. Cartridge Save will deliver this HP C9351A ink cartridge to your home or office on the next business day if you order before today's cut off time. We provide a money-back guarantee, our low price promise and award-winning customer service through live chat and phone support when you buy an HP 21 printer cartridge through our website. With a customer account on our website, we will keep track of the cartridges you buy, like the HP C9351A, to make it easier to re-order them once you need to buy a replacement.

Product Specification

Product Specification

More Information
Package Description:No
Manufacturer Part No.:C9351AE, C9351A, HP 21, HP21
Manufacturer part no.:No
Duty Cycle:Approx. 190 pages @ 5% average coverage
Capacity:5ml
Brand:HP
Colour:Black
Product Type:Ink Cartridge

Product Information

Product Description

Genuine Black HP 21 Ink Cartridge

The genuine black HP 21 ink cartridge is an affordable and reliable product for printing sharp and crisp text documents, as well as monochrome graphics with the most distinctive detail. The pigmented formulation of the HP C9351A black ink allows it to adhere easily to plain paper, so bleeding and smudging is minimised and outputs last for year without fading. The HP 21 ink cartridge can be used for printing on different speciality paper like glossy sheets and special media for flexibility in the ways you can display your printing outputs. The HP C9351A ink unit is just right for the needs of a small office or home users with it being able to produce an estimated 190 pages of high quality print.


Buy Cheap Black HP C9351A Ink At Cartridge Save

Free delivery makes our black HP C9351A printer ink cheaper than what other online retailers are selling. Buy a new HP 21 ink cartridge from our secure website using any major card. Cartridge Save will deliver this HP C9351A ink cartridge to your home or office on the next business day if you order before today's cut off time. We provide a money-back guarantee, our low price promise and award-winning customer service through live chat and phone support when you buy an HP 21 printer cartridge through our website. With a customer account on our website, we will keep track of the cartridges you buy, like the HP C9351A, to make it easier to re-order them once you need to buy a replacement.

Product Specification

More Information
Package Description:No
Manufacturer Part No.:C9351AE, C9351A, HP 21, HP21
Manufacturer part no.:No
Duty Cycle:Approx. 190 pages @ 5% average coverage
Capacity:5ml
Brand:HP
Colour:Black
Product Type:Ink Cartridge

Customer Questions & Answers

Customer Questions & Answers

Can't find the answer you're looking for? Ask us a question we're happy to help!

We are currently answering questions in: 8 minutes

Questions asked between 9am and 5pm, Monday to Friday excluding bank holidays will be answered within 30 minutes.
  • Is HP 21 ink cartridge compatible with Photosmart 2575 printer ? I usually use HP 337

    Ink cartridge compatibility

    Thank you for your question. Unfortunately the HP 21 ink cartridge is not compatible with the Photosmart 2575. I have included the link to our website which shows all products that are compatible for the HP Photosmart 2575. https://www.cartridgesave.co.uk/ink-cartridges/HP/Photosmart-2575.html

    Answered by Sophie Ruddle (Staff Member) - about 12 months ago
  • I can't seem to find a pack of two black HP 21 cartridges?

    Black HP 21 twin pack

    We don't supply HP 21 black ink cartridges in a twin pack but you can order two single cartridges at a reduced price by adjusting the quantity in the drop down box provided. Alternatively, you can make savings by purchasing a high capacity black HP 21XL cartridge which will last longer than the regular HP 21 cartridge.

    Answered by Paul Miller (Staff Member) - about 6 years ago
  • What HP printers use HP 21 ink cartridges?

    HP 21 ink cartridges

    The printers listed below in blue link text are all compatible with this original HP 21 black ink cartridge.

    Answered by Daniel Zieba (Staff Member) - about 7 years ago
  • I can't seem to find a pack containing the HP21 and HP22 ink cartridges, I can find the black HP 21 but would like a double pack if you have it? Also, how much is your postage? Thanks.

    HP 21/ 22 multipack
    Answered by Vicky Lush (Staff Member) - about 8 years ago
  • How do I put the HP21 and the HP22 ink cartridges into my HP printer?

    Installing the HP 21 ink cartridge

    Removing and installing ink cartridges is designed to be very user friendly, some instructions are including within the cartridge packaging. If you could reply with your full printer model, I will send you the instructions specifically for your printer.

    Answered by Nichola Ansbro (Staff Member) - about 8 years ago

Customer Reviews

Customer Reviews and Ratings

Average Customer Review:
97.2%
50 reviews

Customer Reviews
  1. 60%

    By Bob Wilson on

    Haven't tried it yet!! It looks good.
  2. 80%

    By Carole J on

    I always use Cartridge Save as they deliver promptly. Good price for genuine HP cartridge which installs easily in my HP Desk Jet F380printer and produces good quality print.
  3. 100%

    By DAVY WIGHT on

    good value for the money will use again
  4. 100%

    By Paul on

    I used this on my HP printer. Easy to fit and the print quality is good. I would recommend this item and the service and competitive price provided by cartridge save.
  5. 100%

    By Marie on

    Very reasonable price and delivery was the next day. I saved nearly 50% in costs compared to where I usually purchase the cartridges from
  6. 100%

    By Kay Twigg on

    Used Cartridge save a few times. Very fast efficient service and ease of ordering
  7. 100%

    By Veronica winn on

    Very quick service
  8. 100%

    By Al Wallce on

    Found an old printer in the house and decided to buy these cartridges to test whether it still worked. Cartridge is very easy to install; works fine. The only thing is that since it's the smaller unit (with the less than the other) the printer keeps giving me a message that ink is low while in fact the cartridge is still virtually new. Overall good value for money.
  9. 100%

    By P. N. Beswick on

    The cartridges were delivered promptly as usual, but I was disappointed that no compatible cartridges were available.
  10. 100%

    By Rachel on

    Very easy to fit, very good quality prints. No complaints at all.
  11. 100%

    By ValM on

    Perfect simple installation very good price
  12. 100%

    By Elizabeth Yule on

    As always a very prompt delivery and good quality product for my deskjet printer. Thankyou.
  13. 100%

    By Mr Kaye on

    Easy access to service via the phone. Received quickly by post. A system I have used regularly.
  14. 100%

    By Jac on

    Excellent service and product was exactly as described.
  15. 100%

    By JLS on

    What more can you say about a cartridge when it does the job it's advertised to do and it costs as little as this one? Repeat business is the best recommendation.
  16. 100%

    By Colin P on

    Genuine product, delivered promptly.
  17. 100%

    By Pickles on

    I usually order from cartridgesave as they deliver the product I ordered promptly. The product has always been fit for purpose and much cheaper than in the shops.
  18. 100%

    By Lofty on

    This is giving good service as I use it every day.
  19. 100%

    By ruslan on

    I rely on Cartridge Save for reliable products - and wasn't disappointed this time!
  20. 100%

    By Jennifer on

    I found this product to be the best value around plus also the quick delivery was excellent and to top it all no delivery charge.
  21. 100%

    By pauline skidmore on

    easy to order, came within 2 days, price good, very satisfied.
  22. 100%

    By geoff on

    Excellent product,speedy delivery.
  23. 100%

    By Dave G on


    I only ever buy HP cartridges for my HP Deskjet F380 printer as they produce first class clear documents in colour or black .
    Always from Cartridgesave as the firm delivers so promptly
  24. 100%

    By Clive on

    Service was prompt and value for money. Well done !!.,
  25. 100%

    By . on

    This product was entirely satisfactory
  26. 100%

    By Jack Simmons on

    Ordering was very easy and quick, delivery was prompt, and there was no delay in me getting my printer up and running efficiently - and the price was cheaper than my local specialist store.
  27. 100%

    By Panto on

    First class product. First class seervice.
  28. 100%

    By Panto on

    First class product. First class seervice.
  29. 100%

    By Caz on

    I looked on the internet for HP ink cartridges. And Cartridge Save were the cheapest by far. I will use them all the time now.
  30. 100%

    By Glenda on

    I'm always totally satisfied with the service I receive from you - and with your products,
  31. 100%

    By pwah on

    As fully expected, the product lived up to it's usual fine quality.
  32. 80%

    By sally evans on

    Speedy delievery, good price and good quality
  33. 100%

    By Dawn on

    good quality product
  34. 100%

    By sheila on

    the service given is excellent I would and do recommend you to friends
  35. 100%

    By Anon on

    I receuved very prompt and efficient service.
  36. 100%

    By Patricia Donald on

    Thank-you very good.Patricia
  37. 100%

    By windy1 on

    great item got here next day good price ta
  38. 100%

    By norwak41 on

    Value for money, quick delivery, and excellent quality, really good results, would recommend
  39. 100%

    By glenda on

    Excellent product, excellent service, prompt delivery.
  40. 100%

    By Eden Valley Websites on

    Great service, great product, fast delievry
  41. 100%

    By None on

    The product is easy to fit and works perfectly for a reasonable price.
  42. 100%

    By Tas on

    Fast reliable and efficient service.
  43. 80%

    By Tommy C on

    This is the real thing, I have tried other brand recycled cartridges and although there is a saving initially I have found that sometimes the hassle is not worth it, pay a bit more and you save in the long run.
  44. 100%

    By occasional user in Maida Vale on

    Great price, arrived the following day, easy to install, worked straight away.
    Would definitely use cartridgesave again.
  45. 80%

    By Sylvia on

    This cartidge is of very good quality.Very easy to install and really good clear print.
  46. 100%

    By Adastra Technology Ltd on

    For a change in this world, I got what I asked for, No Fuss, genuine Products and Super Speedy Service... Much cheaper than the high street, would be happy to recommend you.
  47. 80%

    By al on

    delivered quickly
  48. 100%

    By JoJo on

    I always buy this product and have had no problems with it. The service I receive from this company is second to none. Great product, reasonably priced, great service, free delivery. What more could you ask for. I never use anybody else.
  49. 100%

    By Sly on

    Great product and fast delivery
  50. 100%

    By JW on

    Good fast service

Compatibility

This item is guaranteed to work in the following printers

Guaranteed to work in the following printers

To see a full list of products that work in your printer, click on the model name below: