Creative, versatile, vibrant, and durable best describe KINGART STUDIO Dual Tip Brush Pens. Create broad strokes, fine lines, and everything in between, simply by changing ends or brush pressure. Our pens are acid-free, non-toxic, and odorless. The caps are color coded, air tight, and anti-roll. The ink is water-based and blends easily. Use two or more markers to create unique shades and the colorless blender pen for watercolor effects. use these pens for any art project or inspired moment–and no messy cleanup!