Hair: Wolf hair (weasel hair) Shaft: Natural wood * Features the sharp responsiveness and firmness unique to wolf hair, and the warm feel of natural wood. [Sizes] * Large: Total length 282mm / Brush diameter 8.8mm / Hair length 45mm * Medium: Total length 273mm / Brush diameter 8.5mm / Hair length 40mm * Small: Total length 270mm / Brush diameter 8.3mm / Hair length 30mm [Recommended Uses (by size)] * Large size (45mm) Ideal for powerful lines, medium to thick brushstrokes, creating artwork, and practicing large characters. * Medium size (40mm) Versatile type for Kaisho (block script), Gyosho (semi-cursive script), everyday writing, short poems, and creating artwork. * Small size (30mm) Ideal for fine lines, Kana calligraphy, sutra copying, New Year's cards/letters, and detailed expression. [Features] Authentic wolf hair brush finished with Ishikotei's traditional techniques. Achieves both sharp responsiveness and supple firmness, creating beautiful variations in lines. Holds ink well, allowing for free brushstrokes from fine to thick lines. The natural wood shaft fits comfortably in the hand and is less tiring even after long periods of use. Suitable for a wide range of users, from beginners to advanced, and for creating artwork. [How to Care for Your Brush] After use, first wipe the ink from the brush tip thoroughly with paper (waste paper), and then gently rinse with lukewarm water without delay. After washing, wipe off the water well with paper (waste paper is acceptable) and dry thoroughly in a well-ventilated place. * Insufficient care can cause hair loss and damage to the base. [Cautions for Care] Washing vigorously with strong running water will make it difficult to align the hair tips and will distort the shape. When using ink, the ink tends to remain inside the base of the hair and is difficult to dry, so wash the base of the hair with your fingers to thoroughly remove the ink inside. Ink has the property of solidifying only on the part exposed to air, while the inside remains liquid. → If ink remains inside, it will cause root rot → a major cause of hair loss. Be especially careful of root rot and mold in the summer, as it is difficult to dry.