Completely handmade by craftsmen in their own factory in Germany, DaVinci Cosmotop Spin watercolor brushes use five diameters of fibers. Spinning the fibers distributes the stronger, stiffer hairs to the outside of the ferrule while finer, softer hairs remain in the center. This gives the cosmotop Spin it's incredible water holding properties for perfect watercolor handling. Paint brush handles are a laquered Rosewood with hexagonal grip for perfect balance. Truly a work of art!