This Epson T1004 Yellow Ink Cartridge contains DURABrite Ultra ink, which is water, smudge and highlighter resistant, for clear, professional results. For use in Epson Stylus SX510W, SX515W, SX600FW, SX610FW, Office B40W, B1100, BX310FN, BX600FW and BX610FW printers. Each cartridge contains 11.1ml of ink for long lasting use. This pack contains 1 yellow ink cartridge.