The Tombow ABT Dual Brush Pen is a water-based brush pen with two tips: a flexible nylon brush tip and a fine polyester tip. The line width of the brush tip varies depending on the pressure applied to up to approx. 10 mm. The polyester tip with a line width of approx 0.8 mm is perfect for fine lines. Due to the water-based dye ink, colors can be mixed with each other and blended with water to create wonderful watercoloring effects and color gradients. One ink tank provides long-lasting use of both tips. The Tombow ABT Dual Brush Pen is available in six different color sets of 6. The versatile pen is especially suited for hand lettering, watercoloring, bullet journaling and much more. The ink is odorless and not lightfast.