Brother tn 421bk toner cartridge black brother black toner cartridge brother toner cartridges are designed to work perfectly with our printers giving you excellent results and value for money this cartridge yields up to 3 000 pages and works with hl l8260cdw hl l8360cdw dcp l8410cdw mfc l8690cdw mfc l8900cdw specifications approximate yield 3 000 pages colour ndash black manufacturer brother type toner cartridge