Multipurpose watercolor paint: You can draw the lines or large colored lines, mix colors and create new shadows. Very suitable for solid or powder color crayons with watercolor crayons, water-soluble pencils, water-soluble pigments, pigments, pigments. suitable for children, students, amateurs and artists. Easy to use and control: just unscrew the watercolor pen holder and add water or ink. Simply squeeze the pen holder to easily control the of ink or water. (Note: When filling the pen with water, make the amount of water lower than 2/3 of the pen). High-quality nylon brush: The high-quality nylon brush head ensures that the watercolor brush remains intact and not be sprayed, scattered, or scratched during use. Easy to clean: Use water to clean after use.