ErichKrause brushes for watercolor and gouache painting are made from natural horse hair, which absorbs paint well and releases it evenly. The working part of the brush is coated with a special protective compound for preservation during storage and transportation.... The handle is made of natural wood and coated with protective varnish. The set includes brushes of various sizes (rounds No. 2, 3, 4, 5), allowing for both broad strokes and detailed work. The seamless aluminum ferrule is corrosion resistant.