A. The ultrasonic electric toothbrush head can effectively remove dental plaque and reduce gum necrosis. B. The 3D brush head is designed to fit the shape of the teeth. Its small and delicate design makes it relatively easy to press and operate in the mouth. C. It uses the classic 0.152 - millimeter bristles from American brand Tynes. The brush head is certified and has been treated with ultraviolet rays. D. It comes in a vacuum - packed package that meets safety standards. This type is suitable for people who smoke or drink coffee. E. It is suitable for V1X1/X3/X5/X3U electric toothbrushes. Name: Electric toothbrush head Type: Replaceable toothbrush head Model number: For Item type: Toothbrush head Gift: Toothbrush holder Gift 2: Dental floss Model: Suitable for V1/X3/X3U/X5 electric toothbrushes Model 2: Suitable for V1/X1/X3/X5/X3U electric toothbrushes Remarks: Please pay attention to the model: For Precautions: Applicable brush heads Material: Plastic Color: Black Package contents: 8 electric toothbrush heads The package only includes the above - mentioned contents and no other products. Note: The color of the item in the picture may slightly differ from the actual product due to lighting and different displays. A measurement error of +/- 1 - 3 cm is allowed.