[Easy to use and clean] Just unscrew or unscrewed the pen holder to fill the water (not exceeding 2/3 of the pen tube), and it is easy to use. And it is easy to control the water , you just need to gently squeeze the soft pen holder (note: For the first time, you may need to squeeze the pen holder to wet the brush). Then, our watercolor brushes are easy to clean after use. You only need to clean it with water after use, which is suitable for water -soluble pigments, ink, etc. [Aquash] This solid watercolor brush uses a valve design to avoid leakage during drawing. It has the characteristics of leak -proof, self -moisturizing, light weight, and waterproof. It is solid and portable, which is convenient for carrying sketching and painting life. [Including content] You receive 24 hats with watercolor pens, including 12 pointed brushes and 12 flat-tip paintings. There are 6 sizes to choose from (0.12inch-0.39inch). You can use it according to your different situations. It helps you create exquisite painting effect. This upgraded water brush can be given to children, children, adolescents, adults, beginners, amateur enthusiasts, art students, professional artists, etc. [Safety Materials] This watercolor pen suit is made of high -quality plastic pen and sliced nylon brush brush bristles to that the watercolor brush is complete during use and not be sprayed, diffused or applied. Non -, for children's safety, you can rest that your child is painted with our pen suit. [Wide Applications]These paint brush pens can be well applied for a wide range of occasions, such as ink crafts, watercolor works, aquarelle, powdered pigment, watercolors, crayons, water-soluble pencils, acrylic, gouache, inks etc., decorating walls, living rooms, wallpaper, clay, , suitable for students, artists, teenagers and so on, you can draw the line or color large lines, blend colors and create new shades.