The refillable water brush is a handy tool for watercoloring techniques. By squeezing the barrel the flow of water is regulated. The water brush has a protective cap and is perfect for on the move. Ideal for use with Tombow ABT Dual Brush Pens or other watercolor products. Suitable for watercoloring, aquarelle, lettering, illustrating, urban sketching, manga and much more. Easy to refill by unscrewing the barrel. The tip can easily be cleaned with water.