LEXMARK X644H01P, Print Technology Monochrome Laser, High Yield, Black, Yield Value 21000 Pages, Lexmark Cartridge Collection Program Yes, 21,000 standard pages Declared yield value in accordance with ISO/IEC 19752. Outstanding results page after page, year after year. Superior Lexmark design means precision pairing between printer and cartridge for value, quality and environmental responsibility you can count on