Brushes with water tank are perfect for watercolor or watery materials. It also works perfectly with distress inks for scrapbooking. Perfect for watercolor artists, illustrators, designers, graphic designers ... and to work with degraded or washed effects. These brushes contain a water tank which makes it very comfortable to work with. By squeezing the water reserve reaches the bristles, making it unnecessary so bring a water container. The cleaning brush is very simple, you just have to pull the tank and leave all the water. Set of 3: fine, medium and flat. Brad: Derwent