Speedy Inks - 2PK Remanufactured Lexmark Black #23 Color #24 Ink Cartridges 18C1523, 18C1524 For use in: Lexmark X4550, Lexmark X3550, Lexmark Z1420, Lexmark X3530, Lexmark X4530, Lexmark Z1410 Page Yield: Black 215 | Color 200 Shelf Life: 12-18 Months Color: Black | Tri-Color The use of aftermarket replacement cartridges and supplies does not void your printer's warranty