Best answer: There are two 564XL black cartridges used in HP PhotoSmart printers.
The narrow one has a symbol that looks like a bow tie, the thick one has a pentagon (not a hexagon). The box for the narrow one will be marked
"photo" and has a symbol resembling a camera. The box for the thick one does not have anything, just 564 XL. Hope this clarifies it for you.
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