Russian Black Sable, also known as Russian fitch hair, has stiffer hair to create bristle-like strokes, but smooth to not mark the paint layers. These brushes are excellent for delicate blending and smoothing our rides, making them a favorite among portrait and realist painters. They feature seamless, nickel-plated brass ferrules on long, maroon color handles. Hand-crafted by the da Vinci company in Germany. This is a Round Size 10 brush for detail and precision painting with oil.