This Dye-based Yellow Ecotank Ink Bottle is compatible with Epson Expression ET-2500, ET-2550; WorkForce ET-4500 is designed to meet or exceed the specifications of genuine OEM cartridge. Epson T664420 is manufactured under the most stringent quality control standards and is systematically inspected, disassembled, cleaned and refilled with 100% new ink which is made in the USA. Besides the exceptional printing quality, this Epson T664420 compatible ink bottle also gives you an economical alternative to buying expensive OEM (Genuine) Epson cartridges.