Calligraphy Brush Kumano Brush for Kanji and Kana Kana Brush [Ikuryen] No. 8 Mink Kolinsky Fine Brush [Size] Head Length 1.1 inches (28 mm), Diameter 0.1 inches (2.5 mm), [Material] Kolinsky [Features] Versatile brush for both kanji types. It can be used even with the roots of hair, and it is highly popular with practical books.