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The different printers which will operate on them. I have had many HP printers over the years. If it calls for HP 63, get HP 63 or you will have problems. Same goes for the HP 64.
Sorry, there was a problem. Please try again later.The sizes are different. The 63 wont fit into a printer that requires a 64 and vice versa.
Sorry, there was a problem. Please try again later.The number..63 or 64.
Sorry, there was a problem. Please try again later.The difference is one is black and the other is color.
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