Thick watercolor brush with Faber-Castell 6ml tank Refillable brush with 6 ml capacity tank. Synthetic round tip. Made with quality synthetic fiber, it is highly recommended for multiple editing and illustration jobs, as well as a perfect complement for watercolorists and painters in general. Its hermetic tank favors the flow of liquid evenly to the tip. Easy cleaning by pressing the body. Its cap is perfect for scratching and scraping techniques. Contains 6 ml tank for water or ink. Brand: Faber-Castell