Pentel Mini Aquash Water-Tank Brush Brushes with water tank are perfect for watercolour or watery materials. They also work perfectly with distress scrapbooking inks. Nylon bristle brush. Ideal for use with watercolours, pencils, crayons and waterproof markers. Clean, easy to use and does not drip. Ideal for watercolorists, illustrators, drawers, graphic designers ... and for work with degraded or washed effects. When the tank is squeezed the water reaches the bristles, making it easier to work with watercolour paints. Small tank. With valve to avoid dripping. Tip size: medium Brand: Pentel