Use the BC-11e cartridge/BCI-11 tanks when printing color documents. The BC-11e contains the print head unit and two replaceable BJ tanks - the BCI-11 Color ink tank and the BCI-11 Black ink tank. If you run out of ink, you can replace either of the tanks without having to replace the cartridge. BJC-50 BJC-55 BJC-55 BJC-70 BJC-80 BJC-85 BJC-85W Canon LR1