Unscrew, fill with water and start drawing!. Perfect in combination with watercolour pencils as well as water soluble colours. Suitable for wet-on-wet, glazing and dry-brushing techniques (granulation). Cap can be used for scratching and scraping techniques (so-called credit card technique). By application of gentle pressure on the brush barrel, water will run down to the tip. Water tank with a capacity of 6 ml. Brush hairs made from high-quality synthetic thread. Brush size: Medium