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Four black toner cartridges in a rectangular box

LD Products

LD Products 521 52D1000 Black Toner Cartridge 4-Pack

SKU CH-W3S7-NSFR6

Four black toner cartridges, each yielding 6,000 pages, for Lexmark MS810, MS811 and MS812 printers

  • TypeTONER
  • Prints up to 6,000 pages per cartridge at 5 % coverage
  • Four black cartridges included for extended printing capacity
  • Compatible with Lexmark MS810, MS811 and MS812 series printers
  • Manufactured by LD Products as a professional replacement
  • Tested to ISO/IEC 24711 standard for reliable yield measurement

Compatible 521 black toner 4-pack

This four-pack of LD Products 521 black toner cartridges replaces the Lexmark 52D1000 supply for the MS810, MS811 and MS812 printer families. Each cartridge is new and built to the same form factor as the original so it fits the designated Lexmark models without modification. Offices that run high-volume monochrome workloads can keep a spare set on hand to avoid downtime.

Standard yield rated at 6000 pages per cartridge

Page yield is measured at 5 percent coverage under the ISO/IEC 24711 test method, giving a baseline for comparing cost per page across supplies. The cartridges ship ready to install and require no warm-up period beyond the printer's normal start-up routine. Power draw and acoustic profile remain governed by the printer engine itself, not by the cartridge.

Four individually sealed units in one retail box

Packaging may vary but each toner arrives sealed to protect the imaging drum and developer roller from light and humidity until installation. The mechanical keying matches the Lexmark 521 slot so the cartridge seats with a single motion and locks without tools. Buyers who need a higher-capacity supply or colour output will need a different product line.

Highlights

  • Prints up to 6,000 pages per cartridge at 5 % coverage
  • Four black cartridges included for extended printing capacity
  • Compatible with Lexmark MS810, MS811 and MS812 series printers
  • Manufactured by LD Products as a professional replacement
  • Tested to ISO/IEC 24711 standard for reliable yield measurement

Specifications

BrandLD Products
TypeTONER

Questions about this item

How do I install the 521 52D1000 cartridge in my Lexmark MS810de, and what step do people often miss?

Open the front cover, pull the old cartridge straight out, shake the new 521 cartridge gently side-to-side to distribute toner evenly, remove the sealing tape completely, then slide it in until it clicks. The step most people skip is shaking the cartridge before installation.

What maintenance or replacement will the 521 52D1000 4-pack need after printing 6,000 pages per cartridge?

Each cartridge yields approximately 6,000 pages at 5% coverage per ISO/IEC 24711. Once a cartridge reaches that yield, replace it with another from the 4-pack. No separate drum unit or waste toner bottle replacement is required for this cartridge design.

What limit appears first during a long print run with the 521 52D1000 toner?

The primary limit is the 6,000-page yield per cartridge at standard 5% coverage. High-coverage documents will deplete toner faster, triggering the low-toner warning sooner. The printer will stop printing when the cartridge is empty, requiring a swap to the next cartridge in the 4-pack.

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