HOTCOLOR 4 Pack Remanufactured for HP 934XL 935XL 934 935 Ink Cartridge for HP Officejet 6812 6815 Officejet Pro 6230 6830 6835 Printer 1. What's in the box: 4 Pack (Black Cyan Magenta Yellow) Remanufactured High Yield Ink Cartridge for HP 934XL 935XL 2.934 XL 935 XL Ink Cartridge work with : HP Officejet 6812 6815 ; Officejet Pro 6230 6830 6835 Printer 3.Page Yield: 934XL Black C2P23AN Ink Cartridge Up to 1000 pages;935XL Cyan Magneta Yellow Per Color Ink Cartridge Up to 825 pages.(at 5% coverage) 4. Type: Work as HP 934XL (C2P23AN) 935XL (C2P24AN C2P25AN C2P26AN) Original Ink Cartridge ; Remanufactured by HOTCOLOR (ISO 9001 certified facility);Not made by HP. 5. Guarantee: 120 days quality warranty.If there is any problem,DO NOT hesitate to contact us.