360 cleaning: 360 cleaning shortens the time for pets to brush their teeth, which is more convenient than traditional toothbrushes. Effectively reduce plaque and tartar, prevent oral diseases. This dog finger brush toothbrush is made of food grade silicone. It does not contain BPA and no phthalates to protect the pet's health. The soft material does not hurt the dog's gums when used, allowing the dog to enjoy the process of brushing its teeth. Ergonomic design: The design of the finger brush is in line with the dog's oral structure, which is more comfortable. Pets will be more docile when brushing their teeth than using traditional toothbrushes. User Instructions: Put on the toothbrush and go in and add a few drops of water to expand the silicone. This is to prevent the toothbrush from falling off your fingers. This is a method for people with small fingers to prevent the toothbrush from falling off. Size: Finger toothbrush opening is 0.82" in diameter, length is 2". A set contains 4 toothbrushes.