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This is a refurbished product.
This 521H Black High Yield Return Program Toner Cartridge for MS812, MS811 and MS810 Series Printers yields 25000 pages, offers a lower cost per page and contains more pages than standard yield cartridges. Perfect for high volume printing, this cartridge us Unison Toner's unique formulation to consistently deliver outstanding image quality, ensure long-life print system reliability and promote superior sustainability -- all in an innovative shake-free print system.
Lexmark Return Program cartridges are patented print cartridges sold at a discount in exchange for the customer’s agreement to the license requirement that the cartridges will be used only once and returned only to Lexmark for remanufacturing or recycling. These patented cartridges are licensed for single use only and will stop working after delivering a fixed amount of ink and/or toner. Toner may remain in the cartridge when replacement is required. Replacement cartridges sold without these restrictions are also available.