The ABT Dual Brush Pen has two tips for maximum creativity. The fine tip (line width: approx. 0.8 mm) is mainly used when drawing exact lines. The second tip is a flexible brush tip made of nylon. Its line width varies according to the pressure applied to up to approx. 10 mm. Available in 107 vivid colours + blender. Water-based colors can be mixed together and used as watercolours. Perfect for handlettering, watercoloring, illustrating, stamping / card crafting, comic / manga drawing, bullet journaling and much more. These pens are acid-free, non-toxic and odorless. Colours are not light-resistant.