The Royal & Langnickel Aqua-Flo Water Brush Pen Set includes 3 water brushes in different sizes, ideal for watercolor, inks, tempera, diluted acrylics and other water-based colours. Each brush features synthetic Taklon bristles and a refillable built-in water reservoir, allowing you to paint without a separate water cup. With gentle pressure on the handle, water flows to the brush tip for blending, washes, details and quick colour application. A practical set for art journaling, travel sketching, classes, mixed media and creative work away from the studio.