The Epson 103 is a cyan ink refill bottle designed for use with EcoTank printers, providing a reliable way to keep your device running without the need for traditional cartridges. This 65 ml bottle contains dye-based ink that helps you produce vibrant colors across thousands of pages, contributing to a total color yield of up to 7,500 pages when used as part of a full set. To make the refilling process simpler and safer, it features a key-lock bottle design that prevents you from accidentally pouring the wrong color into a tank. This specific ink is compatible with several models in the Epson range, including the L1110, L3110, L3250, and L3550, making it a practical choice for home or small office users who print frequently and want to minimize waste.