Epson T664 Yellow EcoTank Compatible Ink Bottle - 7,500 pages - EPIT664YC - To suit printers; EcoTank Expression ET-2500 EcoTank Expression ET-2550 EcoTank Expression ET-2610 EcoTank Expression ET-2650 EcoTank Expression ET-3600 EcoTank Workforce ET-4500 EcoTank Workforce ET-4550