Our pet tongue coating brush set contains silicone. It can be soft and comfortable, gently scraping off the substance on the surface of the tongue coating, keeping the pet's mouth fresh and odorless. Clean teeth without damaging gums. Its usage is very simple: 1 Fix the pet's head and open its mouth. 2. First, gently brush your teeth with a toothbrush for 30 seconds. 3. Then gently brush the pet's tongue with a tongue brush. Dense silica bristles have strong cleaning ability, ensuring that there are no residual stains on the surface and gaps of teeth.