Inktoner 2 Pack 23 24 Black/Color Ink Fits Lexmark Z1410 Z1420 X3530 X3550 X4530 X4550 Printer Model: Z1410, Z1420, X3530, X3550, X4530, X4550 Compatible OEM Model: 18C1523, 23, 18C1524, 24 Not made by Lexmark