A genuine Brother TN3615XL black "max capacity" toner cartridge. 

Yield: 25,000 pages

For use with these printers:

• HL-L6415DW
• MFC-L6915DW

Note: We recommend that you tell us your printer model at checkout so we can confirm that you've ordered the correct cartridge for your printer.

Note: Brother TN3615 (yield 18,000 pages) in Related Products is compatible with these 2 printers AND 2 more printers (HL-L6210DW and MFC-L5915DW).

Brother calls TN3615 "ultra high yield" for 18,000 pages and TN3615XL "max capacity" for 25,000 pages. Check your printer model carefully before choosing from these two cartridge options.