[Set Includes] You will get 12 pcs blue watercolor brush pens with pen caps and 6 different sizes of brush heads. The quantity is enough for your daily study or use.[ Material] The refillable watercolor pens are made of quality nylon tips and plastic pen bodies. It is soft and elastic, with smooth and delicate water flow. It will not , spread, or smear when used.[Anti-Leak Design] This water brush pen for watercolor is designed with a valve to avoid leakage when painting. It is self-lubricating, leak-proof, waterproof, and , making it very convenient to use or out.[Easy to Use] For watercolor paint pens, you only need to unscrew the pen barrel of the watercolor pen to add ink or water (be careful not to exceed 23 of the pen barrel's volume). Gently press the pen barrel to control the flow of water or ink. Clean it with water after use.[Wide Application] This soft watercolor brush pen is suitable for watercolors, powdered paints, acrylics, gouache, ink, watercolor crayons, water-soluble pencils, and water-soluble pigments. You can use a pointed water brush for thin outlines and a flat water brush for thicker lines or fill and blend colors.Colour:BlueMaterial:plasticSize:15x1.3x1.8 cmPackage Contents:12 * Water BrushOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +- 1-3cm.