Title: Double Check The Correct Cartridge Number
Review: The HP 78 tri-color cartridge is listed on Amazon as fitting the HO 1oooC printer. I ordered it and tried to install it. It would not work. I called the independent sales company nand was told the cartiidge was incorrect for the HP 1000C. They told me that since the package was opened and that part number cartridge was not listed for my printer in their files they would do nothing. Beware! Double check any part number listed on the web and check for actual vendor.
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