Speedy Inks - Lexmark Remanufactured 18C1523#23 Black Ink Cartridge For use in: Lexmark X4550, Lexmark X3550, Lexmark Z1420, Lexmark X3530, Lexmark X4530, Lexmark Z1410 Page Yield: 215 Shelf Life: 12-18 Months Color: Black The use of aftermarket replacement cartridges and supplies does not void your printer's warranty