* With the Koi Water Brush, you always have a brush and water with you! * Ideal for watercolor painting. * The self-moistening brush pen with a round nylon tip is equipped with a refillable reservoir (4ml) and a cap so you can take it anywhere. * Easy dosing by gently squeezing the reservoir. * Do the same after use, and the Water Brush will be clean in no time. * There are 3 different brush thicknesses: small, medium, and large. * This package contains: 1 refillable medium-sized brush. * You can also fill the Koi Water Brush with another liquid like ink. * Calligraphy and lettering are at your fingertips. * Koi watercolor no longer requires a lot of messy handling and equipment. * Go out and feel unlimited freedom with Koi products. * These products can be used separately or together. * Koi Coloring brush pens have a flexible and durable tip to achieve different line widths by adjusting the pressure on the tip. * After use, the brush pen tip returns to its original shape. * The ink is water-based, allowing for beautiful color shades, gradients, or by mixing the colors of the pens by holding the tips together. * The ink is also water-dilutable for watercolor painting. * The Koi Water Brush with an integrated water reservoir allows for watercolor painting on the go or to be used with another liquid. * This gives you the ability to paint during your travels or outdoors without needing a direct water source. * Koi Water Color Sketch Boxes: practical foldable watercolor box in pocket size, includes Water Brush. * Available in various versions.