Pentel Water Brushes
This versatile nylon-tipped brush allows you to fill the barrel with any water-soluble medium (water-soluble inks, watercolours or gouache) to use for lettering or painting.
Alternatively, you can just use water and pick up watercolour or gouache colour from your palette to create great wash effects. You can control the density of colour by squeezing on the barrel of the brush pen to make the brush wetter or drier.
Comes in three different sizes: small, medium and large.