Considered by many artists to be the world's best brush. Has finest hair from tail of kolinsky. With polished black handle and seamless, cupro-nickel ferrule. 5-brush set also available. - Winsor & Newton Series 7 Kolinsky Sable Brush - Pointed Round, Set of 5SET 5 - This set includes sizes 0, 1, 2, 3, and 4.