Each LC426BK is filled with sufficient Brother black ink to print an estimated 3,000 pages, offering you the cheapest Brother cartridge of this colour to get your MFC-J4540DW or MFC-J4340DW. You can use the Brother LC426BK ink cartridge in with a select few inkjet printers, a full list of which can be found on this page. This original Brother LC426BK is a standard capacity black cartridge from this new range of ink cartridges. Selecting a genuine Brother LC426BK ensures that your printer can produce prints of the very highest quality, matching the manufacturer`s vision for this series. We are more than confident that you will love the results produced.