The Kuretake Fudegokochi Brush Pens have a firm felt brush tip which provides a line variation ranging from approximately 0.4mm to 1.8mm in with and is suitable for users to express through art, calligraphy and lettering. It can also be used as the regular marker. One of the key highlights is that the lines will remain saturated even when running on low ink. This enables users to use continuously without being bothered about any fading lines, until they run out of ink. This brush pen also comes with a ventilated cap.