This is a tool for painting Gaian Knots "Brush Series BSL01 Premium Sable Liner Brush #1".
Each brush is hand finished by skilled craftsmen using the finest Kolinsky bristles in sables.
Flexibility, brush stroke, paint content, and comfort are all the best brushes.
The tips of the heads are well arranged, making them perfect for painting delicate areas such as drawing lines and painting the eyes of the figure.
(From Amazon.co.jp)