Derwent-Waterbrush Assortment. Developed for artists to paint 'en plein air'. Easy to control water flow with a non-drip valve, these brushes are portable, leak proof and easy to clean. Fine, Medium and Chisel tip heads are easily distinguished by number, so you can grab the one you need to paint with. This package contains three water brushes (a handy water holder and brush in one) with one fine tip, one medium tip and one chisel tip. Imported.