Koi water brush is designed for the easy transportation and storage of water when you"re away from home or the studio. The brush separates into two parts a fine, flexible brush tip and a barrel handle with a plug to carry the water. The comfortable grip is great for controlled blending, shading and highlighting. Technical qualities are polypropylene, transparent barrel and nib holder section, nylon fibers for brush tip, small barrel 47 8inch overall brush length, by screwing barrel apart, the small brush collapses to 27 8inch, for ages 8 years and cap and plug please keep away from small children. 2 rounds brush. Available in small size. Comes in 4ml barrel tank.