Ink Port Caps fit over the ink exit port on the cartridge to protect it against damage and leaking during transport. These caps fit Canon BCI-3/6/ PGI-5/220/225 and Hewlett Packard HP564/564XL/920/920XL Pigment Black cartridges.
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Posted by L. Max Acosta on April 27 2021
The caps provided a tight fit over the bottom port of the ink cartridge with no leakage during the ink refilling process. I'm able to reuse the empty ink cartridges for my printer that are no longer ready available in stores in Denver, Colorado. The side benefit is also I'm saving a lot of money not having the to buy ink cartridges online at a stiff price. The ink I'm using is a quality ink that is comparable to original ink from the manufacture. Canon no longer stocks the ink cartridges for my printer.