Designed for C540 series laser printers, this Imaging Kit from Lexmark contains everything you need to refresh the performance of your printer. It contains one each of black, cyan, magenta and yellow imaging units for a comprehensive overhaul of your printer's mechanisms. Each imaging unit uses an electrostatic charge to generate text and images on the page, making it an essential part of the printing process and vital to replace at regular intervals. This kit delivers up to 30,000 pages from each unit.