Made of fine quality blended synthetic fibers of differing thicknesses, the Cotman brushes will help you achieve excellent results in a variety of watercolour techniques. These brushes are specially designed to: Hold paint and water for a long, even stroke To retain their point.  These durable brushes will help you achieve excellent results in a variety of watercolour techniques.  Its combination of thick fibres for strength and spring and thin fibres for colour-carrying capacity ensure excellent results over a long period. This set includes brush sizes: Round 4 & 6, Rigger 1, One Stroke 3/8"