1Double head design, no harm for gums, safety and sanitary to use. One end is cone shape, the other end is soft brush, easily to clean and prevent bacteria.2Made of food grade PP material, easily clean interdental residue while protect gums. Suitable for people with large tooth crevice, can rotate arbitrarily without breaking and can clean stubborn residue. 3Suitable for most people, both applicable to children and elderly, no harm for health. 4Super toughness without fracture, moderate hardness to completely remove the residue. 5No bleaching during production, no toxic additives, safer and healthier.