Mess Free: Being quality nylon hair, brush tip stay intact and does not spray, spread, or smear while using this brush pen. Easy to Use & Clean: To use this watercolor painting pen, simply to squeeze to control the ink or water flow, and clean with water under tap after using this water color painting brushes. A Variety of Nib: 3 different nib types available, including 3 different sized tip nib. Use the fine nib water brush ink pen for tiny detail & the large nib for broad strokes. Multiple Purpose: Can be used for solid colors or powdered pigment, coloring, and use with watercolor crayons, 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/medium/large size.