High-yield toner cartridge is designed to work with Lexmark Optra T printers (T610, T1610n, T612, T614, T614n, T614nl, T1616 and T616n) and will not work with other products. Superior Lexmark design means precision pairing between printer and cartridge for value, quality and environmental responsibility you can count on. Choose Genuine Lexmark supplies for genuine Lexmark results. Cartridge yields approximately 25,000 pages at 5 percent coverage.