Compatible Brand LC-51M Magenta Inkjet Cartridge fully compatible with the Brother DCP-165c, 385C, 585 CW, 6690CW, MFC-240, 290C, 490CW, 665CW, 845CW, 5460CN, 5490CN, 5860CN, 5890CN, 6490CW, 6890DW, 790CW, 990CW. The use of compatible supplies does not void your printer warranty.