Pentel Arts Aquash brush pens Round Medium - Mini Body - Reservoir Capacity – 7.5 ML. Ideal for sketching, drawing, blending, writing & painting on the move. Extremely durable nylon tip which holds its point; Can be refilled easily & as often as desired; Fill your Pentel water brush with water, ink or liquid colour. Easy to squeeze barrel delivers water via the tip, making it the perfect tool to create different aquarelle techniques or to mix colours on a palette; Translucent barrel allows monitoring of water supply. Shape of the water brush prevents it from rolling off; ACMI Certified. Is easy to clean & dishwasher safe as well; Squeeze the reservoir to saturate the tip & clean the tip gently on tissue paper or sponge