A:AnswerYes, either the 63 or 63 XL cartridges will work. They're physically identical, except that the XL cartridges have a little more than twice as much ink in them.
A:AnswerThe HP 64XL is a high yield ink cartridge which has three times as much ink as the regular HP 64 ink cartridge. Both ink cartridges will work with the HP ENVY Photo 7155 printer.
A:AnswerCkeck the old cartridge to be sure of the number
There will be black and a multi color. You do not have to replace them at the same time. Depending on your printing needs, one generally runs out before the other. Your screen or the program will indicate printer cartridge levels.
