DecoArt Water Marbling Sumi Brushes 2 pack - Traditional Sumi brushes are loaded with marbling acrylic and then lightly tapped on the surface of the water for the Japanese method (Suminagashi) of water marbling. This package contains two Water Marbling Sumi brushes, each 24cm long, with absorbent natural hair bristles and natural bamboo handles. Care: clean brushes with water only and lightly re-shape tip to a point.