The Krest Cleopatra Comb 400 Black is made of long-lasting nitrile rubber. Used for professionals and at homes for generations, which means trust and reliability. These Cleopatra 400 hair combs measure seven inches in length. hair cutting and styling combs can be used for wet and dry hair cuts. All purpose styling comb. Krest combs are designed with the selective professional in mind and made exclusively for your hair styling needs. Numbered ruler on one side for precise sectioning.