If you want a toner that is really designed to last then you need the Lexmark T644 Black Extra High Yield Toner Cartridge. This toner is specially designed by Lexmark to get the absolute best out of your printer without having to constantly change your toner cartridge. Just because the cartridge has an extraordinary page yield of 32,000 pages doesn't mean that it lacks quality in other places. The toner provides the same crisp and sharp printing as standard capacity cartridges for great results from your T644 printer.