Cotman brushes feature a blend of synthetic fibers that vary in thickness, which allows for added strength and spring as well as improved color-carrying capacity. Together they retain a perfect point time and time again. Short blue lacquered handles provide balance and comfort while nickel-plated brass ferrules prevent corrosion and enable easy cleaning. Designed specially for watercolors. The 666 Series features flat wash tips that are perfect for edges, shapes, washes, and calligraphic strokes.