6 Bright White - You can use this hair color comb to creating so many different looks; Z --The length of the hair color comb is about 3.9(10cm) Safety & Easy to Clean -The hair chalks are non-allergenic and water-soluble and environmentally friendly and can last up to 3 days; Colors can be cleaned simply by washing hair as normal with water and shampoo. Note - This hair chalk is very easily applied to light hair like gray and blond hair. But it is a bit difficult for dark or brown hair, you can follow step:1. Apply the color to a handful of hair one time. 2. Seal the chalk and dry the hair with a hairdryer or fan. 3.Finalize your hair with gel or hairspray. And the chalk might be a little sticky. Applicable People and Scenes - A party hit with the kids; Suitable for birthday, parties, Weddings, Clubs, Festivals, Cosplay, Engagement, Halloween, Christmas, etc, creating a beautiful and unique look for yourself. A cool gift for your family and friends. Easy to Use -With the design of a fixed comb, they are easy to apply on your hair from top to bottom without stain your hands. Keep your hands color-free.