Features: U-shaped bite is designed to fit the mouth shape, can clean the surface and interior of the teeth in all directions. U type single mouthpiece design, so you brush your teeth to liberate your hands, improve the efficiency of your life. Perfect for V-WHITE Automatic Electric Toothbrush, put the toothpaste into this silicone head. Made by food grade antibacterial silica gel, super waterproof, can be cleaned and reused. With automatic eletric toothbrush, can kill 99.99% of the bacteria in the mouth.