Speedy Inks - 4 Pack Remanufactured Lexmark 36XL / 18C2170 High Yield Black Ink Cartridge For use in: X3650, X4650, X5650, X5650es, X6650, X6675, Z2420 Page Yield: 500 | Pack of 4 Shelf Life: 12-18 Months 100% Quality Satisfaction Guarantee The use of aftermarket replacement cartridges and supplies does not void your printer's warranty