HP 934XL/935 Black High Yield and Cyan/Magenta/Yellow Standard Yield Ink Cartridge, 4/Pack (N9H66FN#140) | Staples
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Amazon.com: HP 934XL Black High-yield Ink Cartridge | Works with HP OfficeJet 6810; OfficeJet Pro 6230, 6830 Series | C2P23AN : Electronics
![Amazon.com: HP 934XL Black High-yield Ink Cartridge | Works with HP OfficeJet 6810; OfficeJet Pro 6230, 6830 Series | C2P23AN : Electronics Amazon.com: HP 934XL Black High-yield Ink Cartridge | Works with HP OfficeJet 6810; OfficeJet Pro 6230, 6830 Series | C2P23AN : Electronics](https://m.media-amazon.com/images/I/713cOZUESAL._AC_UF894,1000_QL80_.jpg)