All hair used in daVinci natural hair watercolor brushes is dressed and prepared in the daVinci factory by skilled artisans who turn over the prepared hair to experienced brushmakers for hand shaping. In this way, quality standards are assured from raw material to finished brush. Kolinsky Sable rounds point and snap with unmatched resilience and strength. The reservoir, or belly, of the brush recharges the tip. The Maestro designation denotes the highest quality Selected Winter Male Kolinsky Red Sable hair from the Tobol river region in Eastern Siberia. In this region, hair from male, winter tails grows the longest and strongest due to the extreme cold. Expertly shaped, these brushes are unmatched for spring, resiliency, color- & water-carrying capacity and their ability to hold a sharp edge or point. They are excellent for precise, controlled brush strokes, detail work, illustration, and restoration. Each brush features a durable, seamless, nickel- or gold-plated brass ferrule.