These gel brushes are used to build gel nails and we have both professional gel brushes and brushes for beginners. We have gel brushes in sizes 2, 4, 6, 8, 10 and 12 as well as professional gel brushes from IBD and EzFlow. The professional brushes are handled by skilled brush manufacturers, and the hair consists of the finest Kolinsky Zobel hair. All gel brushes should be cleaned with a cleaner on a piece of nail wipe when you are ready to use the brush and then put the brush back in the case to keep the hair clean until next time you use the brush. Always make sure that your brushes with gel never get direct or indirect sunlight, because it cures the gel on the brush and destroys it.