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A is the standard size and X is the high-capacity, which offers more savings with a lower cost per page.
Sorry, there was a problem. Please try again later.X usually designates the higher capacity toner cartridge....more copies produced per cartridge
Sorry, there was a problem. Please try again later.One is probably a larger ink cartridge, the larger cartridge will only work in certain printers as well as the smaller one. Need to check what your printer can handle.
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