Series 10 has European style shaping with an extra-sharp point and the fastest action at the tip. The Maestro designation denotes the highest quality winter male Kolinsky Red Sable hair from the Tobol River region in Eastern Siberia. Excellent for Watercolors, Illustration, Animation and Rendering. All brushes are handmade from raw material to finished brush by skilled artisans at the da Vinci factory. • Seamless, nickel plated brass ferrules are rust-resistant and long lasting. Sizes 10/0 to 50.