Package: ? Total 4PK=280ml dye ink: Black 70mlx1, Cyan 70mlx1 Magenta 70mlx1 Yellow 70ml x1 ? Solution for ink Problem. ? Solution for Normal Ink Cartridge Issue Compatible with: Expression ? ET2710 ET-2720 ET-2800 ET-2803 ET-4800 ET-1110 Ecotank Printer. ? Workforce ET-4700 Printer. Smooth printing: LKB (Lucky Bridge) dye ink designed to prevent corrosions and clogging of printhead and offer the best print reliability. With high-purity ink, it would not block the print head. Easy to operate. Warranty Card: Free return or exchange within 2 years for any unsatisfied order. 24 Hour online service until the issue is resolved. ? LKB Tips: ? The bottle mouth is sealed with aluminum film to ensure the ink will not leak during transportation, so please tear off the aluminum film before refilling ink; ? You don’t need to empty the ink tank and clean the print head before using our compatible 522 ink (because the original T522 ink is dye ink too). How to contact with us: Product listing > Click Sold by Titelbaum> Choose the option Ask a question Log into Your Account > Click Your Account > Your Order > Find your order and click Contact Seller