The roller ball is designed for pets to enjoy the joy of finding and running with the ball. It is conductive to arise pets interest to move and reduces their negative and destructive behavior. Not only that, it can arise pets’ curiosity and makes them keep active mentally and physically by enjoying the fun of sports. Features: Advanced automatically avoid obstacle function provides fancy experience to your pet. Replaceable Coral Velvet Covers with 4 bright colors are not only attracting your pets’ attentions, but also cleaning your home. The ball is made of non-toxic high quality ABS material, which is also features certain impact and heat-resistance. Teeth cleaning and grinding function is conductive to keep your pet’s oral health. Prevent your pet’s unnecessary, anxious and destructive behavior to keep its mental health. Ball covers in four different colors can be disassembled and their coral velvet material is easy to clean and quick in drying. Easy to assemble and you just need to