Valuetoner Remanufactured Ink Cartridge Replacement For Hewlett Packard HP 934XL & HP 935XL High Yield C2P23AN C2P24AN C2P25AN C2P26AN (1 Black, 1 Cyan, 1 Magenta, 1 Yellow) 4 Pack Compatible With Officejet 6812 6815 Pro 6230 6830 6835 Printer Color: Black, Cyan, Magenta, Yellow Printer Compatibility: Officejet 6812 6815 Pro 6230 6830 6835 Printer. Warranty: 1 year limited warranty Page Yield: 1000 pages per black cartridge & 825 pages per color cartridge If the cartridges do not print, please do a print head cleaning. Contents: HP 934XL & HP 935XL High Yield C2P23AN C2P24AN C2P25AN C2P26AN (1 Black, 1 Cyan, 1 Magenta, 1 Yellow) 4 Pack