water brush:Nylon brush tip with refillable reservoir.
These brush pens are easy to clean, just washing it under water after used. Note: This set of water brush pens are not come with water in it. You can fill up the barrel by yourself to create a watercolor painting.
3/6 PCS Set Water Paint Soft Brush Pen Watercolor Brush Pen refillable Nylon Brush Tip Pen For Painting Drawing Art Supplies