The HP 934XL/935XL Cyan, Magenta, Yellow & Black Ink Cartridges can churn out up to 1000 pages of printing, and provide consistent quality that can last for decades.X4E14AE is compatible with the following printers:- HP Officejet Pro 6830 e-All-in-One- HP Officejet 6820 e-All-in-One- HP Officejet 6220 ePrinter