Shanghai Crafts Small Brush Set of 4 High-quality weasel hair small brushes with excellent writing quality. Weasel hair is also called "yūmō" (鼬毛) and is known for its excellent bundling, resilience, and sharpness. It is durable and the tips are less likely to wear out, making it suitable for small characters and kaisho (block script) calligraphy. I liked them and bought them in bulk before. I hope you will find them useful. Thank you for looking.