This Pentel Aquash Water Brush Triple Pack contains Pentel Aquash Water Brushes in fine, medium and broad. These are nylon brush tips on a pen body that can be filled either with water or colour. Use them to apply watercolours, ink and gouache, or fill it with water to blend watercolours, pastels or crayons easily and smoothly. The three sizes of tip mean you’ll be able to achieve a variety of effects, while the 10ml capacity also makes the Pentel Aquash Water Brush a convenient alternative to a water pot for travelling.