HOTCOLOR Remanufactured Ink Cartridge Replacement for HP 934XL HP 935XL Work for HP Officejet 6812 6815 Pro 6230 6830 6835 Printers (Black, Cyan, Magenta, Yellow, 4-Pack) 1.page yield: 934 XL Black Up to 1000 pages , 935 XL Cyan Magneta Yellow Up to 825 per cartridge 2.Contain: 4 Pack -- 934XL Black 935XL Cyan Magneta Yellow Remanufactured Ink Cartridge 3.Compatible Printers: Officejet 6812 e-All-in-One Printer, Officejet 6815 e-All-in-One Printer, Officejet Pro 6230 ePrinter, Officejet Pro 6830 e-All-in-One Printer, Officejet Pro 6835 e-All-in-One Printer 4.BK-53ml , C/M/Y-15ml & Type: Remanufactured 5.Guarantee: 120 days quality warranty.If there is any problem,DO NOT hesitate to contact us.