Lexmark MS/MX521 Corporate 25K Toner Cartridge Ultra High Yield Black 56F2U0EFor consistent outstanding image quality, the Lexmark Black toner offers an innovative shake free print system with superior sustainability. With an ultra high yield of 25,000 pages, this Return Programme cartridge is perfect for high volume printing and the patented cartridge can be returned to Lexmark for remanufacturing and or recycling. Lexmark's Corporate Cartridges further advance the sustainability innovations delivered by the Unison toner