Review on Premium Replacement Toner Bank Drum Unit 2PK for Brother DR820 DR-820 - Compatible with MFC-L5850DW HL-L6200DW HLL6200DW & More! by Brandon Christianson

These toners only fit genuine Brother drum HL-L2340DW. I couldn't fit it to my existing drum from any of the generic brands and was about to post that it doesn't fit the HL-L2340DW, but luckily I still had my old drum, the original Brother drum, and it fits in there like a glove. Strange because the other toner I had (a different brand) works with both drum units. So the toner works great as expected, just a warning it may not work with your drum if it is not a genuine Brother drum.