Zhu Ting Student Nylon Wool Multifunctional Watercolor Brush 1. Material: nylon+aluminum tube+wood pole 2. Application: acrylic, gouache, watercolor, etc. 3. The brush hair is uniform in color, soft and elastic 4. Nylon wool, once dipped and used for longer 5. Painted wooden penholder, ergonomic design, not tired for a long time to hold 6. Aluminum alloy interface to prevent the pen tip from falling off 7. Weight: 31 grams 8. 1#: total length 18.2 cm, hair length 1.5 cm, hair width 0.2 cm 9. 2#: total length 18 cm, hair length 1.1 cm, hair width 0.7 cm 10. 3#: total length 17.5 cm, hair length 1 cm, hair width 0.25 cm 11. 4#: total length 18.5 cm, hair length 1.3 cm, hair width 0.8 cm 12. 5#: total length 18.6 cm, hair length 2 cm, hair width 2.8 cm 13. 6#: total length 18.3 cm, hair length 1.1 cm, hair width 0.9 cm 14. 7#: total length 18.8 cm, hair length 1.5 cm, hair width 0.4 cm 15. 8#: total length 19.4 cm, hair length 2 cm, hair width 0.9 cm 16. 9#: total length 19.4 cm, hair length 2.2 cm, hair width 0.5 cm 17. 10#: total length 19.6 cm, hair length 1.6 cm, hair width 1.1 cm 18. 11#: total length 19.2 cm, hair length 1.6 cm, hair width 1 cm 19. 12#: total length 19.8 cm, hair length 1.8 cm, hair width 1.2 cm 20. 14#: total length 20 cm, hair length 1.9 cm, hair width 1.5 cm 21. Note: There are 13 pens in a set