This is a compatible Epson T664 ink bottles combo; includes 1 each of black (T664120) cyan (T664220) magenta (T664320) and yellow (T664420) ink bottles. These cartridges are made to compare to the original in terms of both quality and page yield standards. These cartridges are compatible with: Epson Expression ET-2500 ET-2550; WorkForce ET-4500