6 combs for hair dye: You can create so many different styles with this hair color comb: the length of the hair color comb is about 10 cm. Safety and easy to clean: hair chalk are not allergenic, Non -toxic and water soluble, in addition to being environmentally friendly and can last up to 3 days: the colors can simply be cleaned by washing the hair with water and shampoo. Note: This hair chalk is very easy to apply in Clear hair like gray hair and blondes. But it is a bit complicated for dark or brown hair, you can keep up: 1. Apply the color once in a handful of hair. 2. Seal the chalk and dry the hair with a hair dryer or a fan. 3. Finish your hair with gel or hair lacquer, and the chalk can be a bit sticky.