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 TWO more printers.

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. Ideally type your printer model  as you go through checkout!