Product Name: 934XL 935XL Ink Cartridge Package Contents: 2x934XL+2x935XL CYM High Page Yield: Black: 1200 pages at 5% coverage per 934XL Black cartridge Colours: 825 pages at 5% coverage per 935XL Color cartridge Compatible for: Office-Jet Series: 6220 6800 6812 6815 6820 6822 6825 Office-Jet Pro Series: 6230 6830 6835 6836 ADVICE: If you are not sure which toner, ink or drum unit cartridge the printer requires, please check the label of your old unit cartridge. It will help you see the correct required cartridge model. WARRANTY: 30 days for a refund or replacement from the date of purchase ? If you have any questions or concerns please do not hesitate and send us an email. A customer service representative will gladly assist you. ? The use of compatible or replacement cartridge supplies does not void your printer’s warranty.