Series 1310 has a thick belly that feeds the tip for long strokes of color and laying down even washes with great control. The Maestro designation denotes the highest quality winter male Kolinsky Red Sable hair from the Tobol River region in Eastern Siberia. All brushes are handmade from raw material to finished brush by skilled artisans at the da Vinci factory in Germany. Sizes 2 to 35.