This is a red ink refill for Munhwa Do-Zone water chalk markers. It is a consumable item that helps you easily refill and reuse your existing water chalk markers when the ink runs out. Designed with a pointed nozzle container, it is easy to control the flow to prevent spills during refilling, and its domestic manufacturing ensures high quality. Use it in environments where water chalk markers are used in large quantities, such as classrooms or academies, to reduce maintenance costs and create an efficient writing environment.