Kumano Fude (Kumano Brush) Product Description [Product Details] Product Name: Ikkyu-en Ohou Brush, Size 6 Brush Diameter x Brush Length (mm): 8 x 35 Material: Pure weasel hair Main Uses: For general kanji on hanshi paper. Ideal for kaisho (block script) and gyosho (semi-cursive script) with 6-8 characters on hanshi paper. Made of pure weasel hair, it has moderate resilience and the brush hairs hold together well. I am not familiar with brushes, so The above is quoted from the internet.