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Seven rectangular black ink cartridges in a clear plastic tray

LD Products

LD Products HP 21 C9351AN Black Ink Cartridge 7-Pack

SKU CH-W3SY-TY4V2

A 7-pack of remanufactured black cartridges replacing HP 21 for compatible DeskJet, OfficeJet and PSC printers, each yielding about 190 pages

  • Cartridge Quantity1
  • Cartridge ColorBlack
  • Replacement BrandHP
  • Replacement ModelHP
  • Ink TypeDye-based
  • Approximate Page Yield190 Pages
  • 7-pack convenience keeps spare black cartridges ready
  • approximately 190 pages per cartridge for everyday printing
  • dye-based ink formulated for sharp text and graphics
  • compatible with HP DeskJet 300, 310, 325, 335, 340, 350, 370, 375, 378, 379, 380, 385, 388, 390, 394 and OfficeJet 4315 series
  • remanufactured to strict quality standards for reliable performance

LD Products HP 21 Black Ink Cartridge 7-Pack

This set contains seven remanufactured HP 21 C9351AN black ink cartridges from LD Products. They are designed as replacements for original HP supplies used in compatible DeskJet, OfficeJet, Fax and PSC printers. Each cartridge is cleaned, refilled with dye-based ink and print-tested before packaging. The 7-pack format suits homes or small offices that print regularly and want a ready supply.

For HP printer owners using the HP 21 cartridge

The cartridges fit the models listed in the compatibility data, including various DeskJet, OfficeJet, PSC and Fax devices. Buyers whose printer requires a different HP cartridge number or a colour cartridge cannot use this pack. Users needing pigment-based ink for archival-grade water resistance should also look elsewhere.

Approximate yield of 190 pages per cartridge

Each cartridge delivers roughly 190 pages at standard coverage, giving an estimated total of 1,330 pages across the full pack. Actual output varies with page density and printer settings. This yield figure is the key measure for deciding whether the pack matches your typical print volume.

Highlights

  • 7-pack convenience keeps spare black cartridges ready
  • approximately 190 pages per cartridge for everyday printing
  • dye-based ink formulated for sharp text and graphics
  • compatible with HP DeskJet 300, 310, 325, 335, 340, 350, 370, 375, 378, 379, 380, 385, 388, 390, 394 and OfficeJet 4315 series
  • remanufactured to strict quality standards for reliable performance

Specifications

BrandLD Products
Cartridge Quantity1
Cartridge ColorBlack
Replacement BrandHP
Replacement ModelHP
Ink TypeDye-based
Approximate Page Yield190 Pages

Questions about this item

Does the 190-page yield per cartridge stay consistent when the printer runs all day?

Each cartridge is rated for approximately 190 pages; actual yield varies with print density and usage patterns.

My HP DeskJet F335 only takes HP 21 cartridges — will these work without any other parts?

Yes, they are direct replacements for HP 21 (C9351AN) and fit the listed DeskJet, OfficeJet, PSC and Fax models without extra hardware.

Will these remanufactured cartridges work in my older HP DeskJet 3920 alongside the original colour cartridge?

They are compatible with the DeskJet 3920 and designed to function alongside the printer's standard colour cartridge.

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