Cartridge KMP HP C9351AE Nr.21 black 520 S. H29 refilled

The KMP HP C9351AE Nr.21 black 520 S. H29 refilled cartridge is a refilled black ink cartridge designed for consistent monochrome printing. It delivers an approximate page yield of 1900 pages and is intended as a replacement for original HP Nr.21/C9351AE cartridges in compatible HP printers. The cartridge is produced using a controlled refilling process that aims to restore printhead functionality and ink supply while reducing disposable waste compared with single-use originals.

Advantages

This refilled cartridge offers high yield output suitable for extended printing cycles and maintains sharp, readable text and stable black tones for documents. Reuse through professional refilling lowers environmental impact by diverting cartridges from landfill and reduces cost per page versus many original cartridges. The product is compatible with multiple HP models and is provided ready to install, with standard form factor and electrical contacts matching original specifications.

Suitable for

• Everyday monochrome document printing at home
• Small office print runs and administrative paperwork
• School assignments, reports and student use
• Printing invoices, labels and black-and-white forms

Key specifications

• Cartridge capacity: High (XL) yield, approximately 1900 pages
• Printing colour: Black (mono)
• Product type: Refilled ink cartridge
• Compatibility: Designed for HP printers compatible with Nr.21/C9351AE form factor
• Physical format: Standard replaceable cartridge size and contacts for supported HP models

How to use

Remove the empty cartridge from the printer according to the printer manufacturer’s instructions, taking care to power the printer down or follow hot-swap guidance if specified. Unpack the refilled cartridge, remove any protective tape or packaging, and insert it into the correct slot until it clicks into place. Follow the printer’s on-screen prompts to initialize or align the cartridge if required. Run a test page or print a short document to verify installation and print quality.

Recommendations

Store unused cartridges in a cool, dry place away from direct sunlight and extreme temperatures. If print quality degrades, run the printer’s cleaning routine before replacing the cartridge; print a nozzle check or alignment page to confirm performance. Dispose of spent cartridges through local recycling programs or return schemes where available to support environmental goals.