LxTek Remanufactured Ink Cartridge Replacement For HP 934XL & HP 935XL (1 Black | 1 Cyan | 1 Magenta | 1 Yellow) High Yield - With Ink Level Chip These LxTek remanufactured ink cartridges contain high quality ink that has been formulated for optimum performance. All cartridges have been tested to ensure a hassle free printing experience. Package Contents: 4 Pack of LxTek Remanufactured HP 934XL and HP 935XL ink cartridges - 1 Black | 1 Cyan | 1 Magenta | 1 Yellow (With Ink Level Chip) Compatible Printers: OfficeJet 6812 OfficeJet 6815 OfficeJet Pro 6230 OfficeJet Pro 6830 OfficeJet Pro 6835 Page Yield : 1000 Pages per Black (pigment ink) and 825 Pages per Color (dye based ink) Cartridge at 5% coverage Warranty: All products come with a 1-year limited warranty / Shelf Life: All products have a shelf life of 18-24 months