Made with the highest quality Tobolsky-Kolinsky red sable hair, the Series 1805 FIlbert is excellent for detail, miniature and precision painting as well as applying delicate areas of colour and modelling edges. Sizes 2 and 4 are uniquely shaped for applying textured highlights. Expertly shaped, they are unmatched for spring, resilience, color-carrying capacity and ability to hold their edge. The versatile filbert shape combines the advantages of flat and round brushes and for modeling natural forms. 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.