Valuetoner Remanufactured Ink Cartridge Replacement for HP 934 934XL C2P23AN (2 Black) Compatible for HP Officejet 6220 6230 6812 6815 6830 6835 6820 Printer - Read Accurate Ink Level Contents: HP 934XL F6T96BN C2P23AN (2 Black) 2 Pack Color: Black Page Yield: 1000 pages per cartridge Printer Compatibility: Officejet 6812 6815 Pro 6230 6830 6835 Printer Warranty: 1 year limited warranty