Made with the highest quality Tobolsky-Kolinsky red sable hair, the Series 1600 round is excellent for detail and precision painting. Expertly shaped, they are unmatched for spring, resilience, colour-carrying capacity and ability to hold their edge. All hair used in da Vinci natural hair oil brushes is dressed and prepared in the family owned da Vinci factory by skilled artisans. They are made according to certified green manufacturing with sustainable wood handles and rust resistant silver ferrules.