suitable for children, students, amateurs and artists. Easy to use and control: just unscrew the watercolor pen holder and add water or ink. Simply squeeze the pen holder to easily control the flow of ink or water. (Note: When filling the pen with water, make the amount of water lower than 2/3 of the pen). High-quality nylon brush: The high-quality nylon brush head ensures that the watercolor brush remains intact and not be sprayed, scattered, or scratched during use. Multipurpose watercolor paint: You can draw the lines or large colored lines, mix colors and create shadows. Very suitable for solid or powder color crayons with watercolor crayons, water-soluble pencils, water-soluble pigments, pigments, pigments. Easy to clean: Use water to clean after use. Change your life: No messy watercolor brushes give you peace of mind when painting. No need to deal with messy water bowls and overflow! colour: transparent Material: nylon size: Flat head brush:Trumpet-Hair width: 0.6cm, hair length: 1cm Medium-Hair width: 0.8cm, hair length: 1.6cm Large-hair width: 1.5 cm, hair length: 1.7 cm; brush:Trumpet-Hair width: 0.3cm, hair length: 1.2cm Medium-Hair width: 0.5cm, hair length: 1.5cm Large-Hair width: 0.6cm, hair length: 1.9cm Package Contents: 24 * water pens(12 flat brush,12 brush) Only the above package content, other products are not included. Note: Light 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.