Mess : Being nylon hair, brush tip stay intact and does not , spread, or while using this brush pen. Easy to Use & : To use this watercolor painting pen, simply to squeeze to control the or water , and with water under tap after using this water color painting brushes. A Variety of : 3 different types available, including 3 different sized tip . Use the fine water brush pen for tiny detail & the large for broad strokes. Multiple Purpose: Can be used for solid colors or powdered pigment, coloring, and use with watercolor , marker, and pencils to spread and smooth colors. Best Experiences: Experiencing smooth and continuous writing with our self-filling water brush pens; White/blue and tip; Small//large size.