RIGHTINK Remanufactured Ink Cartridges for HP 934XL 935XL 5PK(BK C M Y)Compatible With HP OfficeJet 6812 6815 Officejet Pro 6230 6830 6835 Printers 1.Package Lists :2x 934XL Black & 1 x 935XL & 1 x 935XL & 1 x 935XL Yellow 2.Page yield (Black) : 1000 pages per cartridge, at 5% coverage, 825 pages per cartridge, at 5% coverage. 3.Type:Remanufactured Ink Cartridges (Not made by HP) 4.Compatible With - HP Officejet 6812 e-All-in-One Printer - HP Officejet Pro 6830 e-All-in-One Printer - HP Officejet 6815 e-All-in-One Printer - HP Officejet Pro 6835 e-All-in-One Printer - HP Officejet Pro 6230 ePrinter 5.Good after-sales service an all products covered by a 100% satisfaction guarantee and 90 days warranty