Buy New Fuzion - Brother DR420 Compatible Drum Units for less than the big box stores from the CartridgeStore Canada (Est 2003). This item should be used with the TN450 toner cartridges. In our opinion, this is the closest alternative you can get to the original OEM Brother drum unit, and one of the only after-market brands carried by the big box stores. Buy the exact same product for less from the most trusted family run toner business in Canada, The CartridgeStore.