Premium Compatible 0954A003 (BCI-21B) Black Inkjet Cartridge fully compatible with the Canon BJC 2000, 4000, BJC 5000, 5100, 5500 Also fits some Apple, Calcomp, Mannesmann, Nashuatec, Panasonic, Rex Rotary, Ricoh, Saven, and Selex. The use of compatible supplies does not void your printer warranty.