What is in the box: 4 Pack Toner Cartridge Set 1 x Black 20N1HK0 1 x Cyan 20N1HC 1 x Magenta 20N1HM0 1 x Yellow 20N1HY0. Compatible Printers: Compatible with Lexmark CS331 CX331 CS431 CX431 CS331dw CS431dw CX431adw CX331adwe Color Printers. High Page Yield: Up to 4500 pages black 4500 pages color at 5% coverage of Letter A4 reducing replacement frequency and cutting down long term use costs. Outstanding printing: Crisp clear text stable imaging and sharp fine images with no vignetting no bottom grey delivering stable and premium printing performance for every single page even with continuous high-yield printing. Wide Application Scenarios: Ideal for small to medium-sized offices home offices, and print-on-demand businesses that require reliable high-volume black-and-white printing for documents reports and marketing materials ensuring consistent quality even during peak workloads. 20N1H CS331 CX331 Toner Cartridge 20N1HK0 20N1HC0 20N1HM0 20N1HY0 High Yield Compatible for Lexmark CS331 CX331 CS431 CX431 CS331dw CS431dw CX431adw CX331adwe Printer (4 Pack 4500 pages)