Going under the code 78C0ZK0 this Lexmark imaging kit covers the black used by your laser printer for an estimated 125,000 pages. Rarely needing changing the Lexmark 78C0ZK0 is essential for the ongoing use of your laser printer.By purchasing a genuine Lexmark 78C0ZK0 you ensure that your laser printer can produce the very best prints available for the life of the unit. When used alongside original Lexmark toner cartridges (regardless of capacity) the genuine Lexmark 78C0ZK0 is absolutely unbeatable and if you are able to have both installed, you are sure to be impressed.