Edding T 100 is a blue refill ink bottle for selected Edding permanent markers. The dropper system helps you refill cleanly and precisely, while the 100 ml format gives you a practical supply for routine marker top-ups. It is a permanent, low-odor ink with no added xylene or toluene. The verified compatibility includes Edding permanent markers No.1, 370, 390, 400, 500, 550, 800, 850, 2000 C, 2200 C, 3000, 3300, 21, 22, and 25.