Lexmark (#23/#24) 18C1571 Black and Color Ink Cartridge Combo Pack Lexmark (#23/#24) X3550 X4550 Z1420 Black/Color Ink Cartridge Combo Pack (Includes 1 Each of OEM# 18C1523 18C1524) Save Time Money and the Environment with Genuine Lexmark Supplies Lexmark (#23/#24) X3550 X4550 Z1420 Black/Color Ink Cartridge Combo Pack (Includes 1 Each of OEM# 18C1523 18C1524) OEM Ink 23 24 Black Tri-Color Pages