Lexmark T640, T642 and T644 supplies are designed for the highest quality output and are designed for easy customer installation and quality performance, from the first page to the last. This print cartridge comes with oiled fuser wipers for customers that do extensive label printing. Lexmark T640, T642 and T644 supplies are not compatible with other Lexmark Printers. Average Cartridge Yield 21,000 standard pages. Declared yield value in accordance with ISO/IEC 19752.