The Brother TN321 4 colour multipack is a pack that we have put together ourselves (rather than a manufacturer made pack) so each of the 4 colour toners have their own 6 month warranty. Original toners very rarely develop faults but if you have any problems at all then give us a call on 0345 365 3605 and we'll arrange for a replacement collection or refund. If there is no fault but you wish to return the toners because you've changed your mind, you will need to let us know within 14 days to avoid a restock fee. You can find the full information on our
returns page.