Product Specifications
| SKU | 11003H |
|---|---|
| OEM Part Number | C9351AN |
| Cartridge Type | Ink Cartridge |
| Compatible Brand | HP |
| Color | Black |
| Condition | Remanufactured |
| Warranty | 100% Satisfaction Guarantee |
| Page Yield | 190 pages |
| Cost Per Page (Our Price) | 6.31 cents |
Product Description
HP 21 Black (C9351AN) at a glance: a black ink cartridge rated at about 190 pages. Remanufactured: a genuine HP 21 cartridge, cleaned, refilled and print-tested. Fits the HP DeskJet D1300–F4180, DeskJet 3910–3940, OfficeJet 4300/5600 and PSC 1400. Backed by a 1-year 100% satisfaction guarantee; orders by 4 PM ET (Mon–Fri) ship the same day from Long Island, NY.
Key Facts
| Condition | Remanufactured (genuine OEM shell, cleaned, refilled, print-tested) |
| Replaces OEM part | C9351AN (HP 21 Black) |
| Page yield | About 190 pages (manufacturer rating for the original) |
| Cost per page | about 6.3¢ per page at our $11.99 price |
| Guarantee | 1-year 100% satisfaction guarantee: replacement or refund |
| Shipping | Same business day when ordered by 4 PM ET (Mon–Fri); free shipping on orders over $50 |
What's in the Box
- 1 × HP 21 Black (C9351AN) remanufactured ink cartridge — about 190 pages
Page yields are the manufacturer's rating for the matching original cartridge, measured at roughly 5% page coverage. Your results will vary with what you print.
Compatible Printers (49 models)
- HP DeskJet D1311 / D1320 / D1330 / D1360 / D1420 / D1430 / D1445 / D1455 / D1460 / D1520 / D1530 / D1560
- HP DeskJet D2330 / D2360 / D2430 / D2460
- HP DeskJet F2110 / F2120 / F2180 / F2185 / F2187 / F2210 / F2235 / F2240 / F2280 / F2290
- HP DeskJet F335 / F370 / F375 / F380 / F4180
- HP DeskJet 3910 / 3915 / 3918 / 3920 / 3930 / 3940
- HP OfficeJet 4315 / 4355 / 5610 / 5615
- HP OfficeJet J3608 / J3640 / J3680
- HP PSC 1401 / 1402 / 1410 / 1415 / 1417
Don't mix these up: HP 21 black pairs with HP 22 tri-color; HP 21XL is the larger black. They are not the same as HP 27/28 or HP 56/57.
Not sure? Look up your exact model on our Find Ink by Printer page, or contact us and we'll confirm the right cartridge for you.
Part Numbers & Also Known As
This cartridge replaces or is also searched for as: C9351AN, HP C9351AN, HP 21 black, HP21 black, 21 black ink, HP 21, HP21, C9351A, 21 black, DeskJet F4180 ink, DeskJet 3940 ink
Chips, Printer Messages & Installation
Installing: open the cartridge access door and wait for the carriage to move to the center. Press down on the old cartridge to release it and pull it out. Unwrap the new one, pull off the plastic tape by its tab without touching the copper contacts or nozzles, and slide it into its slot at a slight upward angle until it clicks. Close the door and print the alignment page if prompted.
"Cartridge problem" or "incompatible cartridge": remove the cartridge, wipe the copper contacts with a dry lint-free cloth, check that all the tape is off, and reseat it until it clicks.
Streaks or missing colors: run the printhead cleaning from the printer's Tools menu or HP software. The printhead is built into these cartridges, so a cartridge that stays streaky after two cleanings is the likely culprit.
Still stuck? See our guide to fixing a cartridge that isn't recognized or contact us and we'll make it right.
Remanufactured vs. Compatible vs. Original
Original (OEM) cartridges are new from the printer brand and cost the most. Remanufactured cartridges, like this one, start as genuine original shells (including the original chip) that are cleaned, refilled with high-quality ink and print-tested, so they fit and communicate like the original at a fraction of the price. Compatible cartridges are built new by a third party with their own chip. Castle Ink sells remanufactured inkjet cartridges and compatible (newly manufactured) toner.
Other Options for the Same Printers
Frequently Asked Questions
How many pages does the HP 21 black print?
About 190 pages, based on HP's rating for the original C9351AN at roughly 5% coverage.
Will this void my printer warranty?
No. Under the U.S. Magnuson-Moss Warranty Act, a manufacturer can't void your printer warranty just because you used a third-party or remanufactured supply. If a non-original supply directly caused damage, that specific repair might not be covered.
How long can I store it?
Store it sealed, at room temperature and out of direct sunlight, and use it within about 24 months for best results. Once opened, install it promptly.
When will my order ship?
Orders placed by 4 PM ET, Monday through Friday, ship the same business day from Long Island, NY, by USPS (2–5 business days). Expedited 1–2 day delivery is available at checkout, and shipping is free on orders over $50.
- See all HP Ink Cartridges