PGI 520/CLI 521: 5 FOOD cleaning cartridges WITH chips:
Compatible cleaning cartridges for Canon with single-use chip replaces the PGI520 and CLI521 series Consists of: 1 PGI525 cartridge and 4 CLI526 cartridges(C,M,Y,BK) filled with a FOOD cleaning liquid of impression head. This saves you from emptying your ink cartridges by running multiple head cleaning processes.