The Officenter 502/T502 Ink Refill Bottles are specifically designed for the EcoTank printers, with a unit quantity of 2 bottles. The bottles are compatible with the Epson EcoTank T502 model and offer a variety of colors including yellow, blue, magenta, multicolor, and black. Manufactured in China, these refill bottles are a cost-effective solution for keeping your printer ink levels replenished and ensuring high-quality prints.