This brush is unique to da Vinci, the Cosmo Top Mix B features the benefits of natural hairs for watercolour: the pointing and edging of sable, the water-holding capacity and wash strokes of squirrel, and the stiffness and durability of fitch. The Quill Mop shape excellent for precise, controlled brush strokes, detail work, and illustration. The combination of hairs are manufactured in plastic quills and bound on blue lacquered handles. Brushes are handmade in Germany at the da Vinci family owned factory since 1890.