Welcome to the Lexmark X-4550 product page. Here you can find information and pricing for your Lexmark 18C1571 Genuine Lexmark Ink Cartridge, 2/Pack, Black; Tri-Color. Easy online ordering of your 18C1524 Genuine Lexmark Ink Cartridge, 18C1571, 18C1523, 18C1524, can be completed from this page. Tonerprice.com backs all of our cartridges with our exclusive warranty. As always, we provide free ground shipping on orders over $75 within the contiguous United States from 5 warehouses nationwide.