The Brother MFCJ6945DW takes the Brother LC3339XL ink cartridges.  You can choose from compatible cartridges or genuine Brother cartridges from Affordable Ink.  Compatible LC3339XL cartridges are significantly cheaper than genuine Brother cartridges with the price of a set of cartridges being close to the price of a single genuine cartridge.

The ink capacity of a compatible and a genuine cartridge are the same.    In our experience there is no noticeable difference in print quality between a genuine and a compatible cartridge.

Genuine cartridges are reliable and are likely to work every time.  Compatible cartridges are a much cheaper alternative to genuine cartridges and we guarantee the compatible LC3339XL cartridges will work in your Brother MFCJ6945DW printer or we will  refund your purchase price in full.