“Twin Head and Durable: The highest quality ideal marker pens for designers, architects, and illustrators innovative and durable design of the nibs ensures they will not lose their firmness over time. detailed artwork: Optimum ink flow and drying rates allow for seamless execution of even the most detailed artwork. Quick-drying: Permanent and quick-drying opaque paint Color Variety: Markers typically come in a wide range of colors, allowing for versatile and creative artwork. Dual Tips: Some markers have dual tips, with one fine point for details and another broader tip for coloring larger areas. Alcohol-Based or Water-Based: Markers can be alcohol-based or water-based. Alcohol-based markers often provide vibrant colors and quick drying, while water-based markers are usually more odorless and can be blended with water. Blendability: High-quality markers may allow for blending colors seamlessly, providing artists with more options for shading and color transitions. Non-Toxic: Many markers are formulated to be non-toxic, making them safe for use by artists of all ages.”