Winsor & Newton Series 7 Kolinsky Sable Water Colour Brush, N2Winsor & Newton is the world's leading brand of fine art materials Series 7 is the world's finest water colour brush Series 7 is manufactured from only the finest pure Kolinsky Sable hair Series 7 uses only the highest quality raw materials is hand made by our brush makers with years of experience For artists who appreciate exquisite quality and longevity, there is no other brush than the Series 7