IKONG 934 XL Compatible Ink Cartridge Replacement for HP 934 935 934XL 935XL Ink Cartridges Work with HP Officejet Pro 6830 6230 6835 6812 6815 6820 6220 Printers Upgrade Firmware Support for 934 ink: Click "IKONG" below the price,then enter "Ask a question" on the Top right to the next page to contact us,with any damaged cartridge emails replied in less than 24 hours 7/7. Contents: HP 934XL 935XL Compatible Ink Cartridge Replacement HP 934 935 (1 Black,1 Cyan, 1 Magenta, 1 Yellow--Total 4 pack) Printer Capacity for HP 934XL: HP Officejet Pro 6830 6230 6835 6812 6815 6820 6220 Printers Ultra-high Capacity:"934 935 XL" High Yield ink cartridges enjoy your $AVING$.(50% cheaper than the brand ) Get brilliant readability and vivid color vibrancy for projects and everyday prints. IKONG-Smart Technology: hp 934xl hp 935xl Ink remaining levels accurately reported for compatible printers-same as OEM capability. One-year limited warranty.