Aqua Elite is an innovative synthetic-hair paint brush that is indistinguishable from natural Kolinsky, yet significantly more affordable. The performance of this new synthetic hair brush technology makes Princeton Aqua Elite the new standard for discerning watercolor artists.Details: Series 4850 12 sets (3 assorted brushes per set) Synthetic Kolinsky filaments Brass ferrules Birch wood short handles For use with watercolorSet Contents: Size 2 round brush Size 6 round brush 1/2" (1.3 cm) angle shader brush