This set consists of 5 polyester brushes. They can absorb a lot of water, which makes them suitable for highly thinned paints such as watercolours and inks. This set contains the following types and sizes: 3 round brushes in sizes 2, 4 and 6, 2 flat brushes in sizes 4 and 6. Due to the strength and resiliency of polyester, filament brushes are highly suited for oil and acrylic colours. As the filament brush absorbs water well, it is also suited for watercolour and gouache.