Speedy Inks - Compatible Brother LC203BK High Yield Black Ink For use in Brother: MFC-J4320DW, MFC-J4420DW, MFC-J4620DW, MFC-J5520DW, MFC-J5620DW, MFC-J5720DW Page Yield: 550 Shelf Life: 12-18 Months Color: Black The use of aftermarket replacement cartridges and supplies does not void your printer's warranty