Hewlett Packard
Compatible HP 11A (Q6511A Q6511X) Toner Cartridge 4 Black
- Page Yield:
- Black: 6000
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Page Yield:
- Black: 6000
- Availability:
- In Stock
- Shipping:
- Free Shipping
- Compatible Printers
- Specifications
- SKU:
- CS-HP-11A-4BK
- Printer Brand:
- Hewlett Packard
- OEM Number:
- Q6511A Q6511X
- Ink Color:
- Black
- Page Yield:
- Black: 6000
- Printer Type:
- Laser Cartridge
- Condition:
- New Compatible
- Description
- Reviews


When it comes to reliable black printing, the HP 11A and 11X toner cartridges are the perfect solution for your printing needs. Designed for compatibility with the LaserJet 2400, 2400DN, 2400D, 2410, 2410XI, 2420, 2420DN, 2420D, 2430, 2430N, 2430DTN, and 2430TN models, these cartridges ensure consistent and high-quality performance. The Q6511A and Q6511X cartridges deliver sharp, clear, and professional-quality prints, whether you're printing documents, reports, or presentations. With the HP 11A and 11X toner cartridges, you can expect exceptional print quality and longevity, making them suitable for both everyday printing tasks and high-volume printing environments. Whether you're printing text documents or graphics-heavy materials, these cartridges provide consistent results with every print. Their high-yield capacity also helps minimize interruptions, allowing for uninterrupted printing workflows. Compatibility is key when it comes to toner cartridges, and the HP 11A and 11X cartridges are specifically engineered to work seamlessly with HP printers. Whether you're using a LaserJet 2400 series model, you can rely on these cartridges to deliver consistent quality and performance. Installation is quick and easy, ensuring minimal downtime and maximum productivity in your office. In conclusion, the HP 11A and 11X toner cartridges offer exceptional black printing performance for a variety of printing needs. Whether you're printing professional documents or personal projects, these cartridges deliver consistent quality and reliability, making them essential components of any office setup.
Frequently Asked Questions
What does this 4-pack contain?
Four individually sealed black cartridges for the 2400-series platform, listed under the family's two codes — Q6511A and Q6511X — at $127.55 for the pack. Every unit is the same full-size cartridge; the four are a stock quantity, not four different items, and each is ready to fit the moment a machine asks for it.
Why is the listing written under two codes?
Because units in this family circulate under both stamps. Some printers' existing cartridges are marked Q6511A and others Q6511X, and a stock pack has to be findable — and orderable — by whichever code the person holding the old cartridge can see. If either code is stamped on your current unit, this pack is the corresponding supply.
How would a department use four cartridges?
As a small central stock for the machines that share this supply — a LaserJet 2400 here, a 2420 or 2430 there. Rather than each machine keeping its own spare, one shelf of four covers the family, issued oldest first. It suits floors where several of these long-lived machines are still in daily service.
How should the four be stored and rotated?
Sealed, flat, in a cool dry cupboard away from sunlight, with the delivery date noted on the boxes. Issue them in arrival order. Toner is a stable dry powder, so a cartridge fitted last prints at the same strength as one fitted first — rotation is about tidiness and visibility of stock, not about a race against expiry.
What tells us it is time to reorder?
When the third cartridge leaves the shelf. One sealed unit of cover remains, every machine in the family is still protected against an unplanned change, and the next pack can be ordered as a routine restock rather than in response to an empty printer.
What cover do the cartridges carry?
Each unit individually carries a 1-year warranty and 1-year free returns, with terms on our shipping and returns page. We ship from warehouses in Illinois, Pennsylvania, Georgia and California, and support is available Monday through Friday, 9 AM to 5 PM CST. A problem with one cartridge in the pack never affects the cover on the remaining three.
About This HP 11A 4-Pack
This 4-pack holds the shared black supply for the 2400-series platform — listed under both Q6511A and Q6511X — as a small fleet stock in our HP toner cartridges range. Four cartridges, one shelf, every machine covered: the quiet, organized way to keep a floor of veteran LaserJets printing.

