1. Made of porous mineral stone, so they are and non-toxic, doing no harm to pets health.2. This kind of stone is very suitable for chewing pets to keep their teeth clean, healthy and tidy.3. This product is not only used to clean the bird's beak, but the sound of the attached bell makes it easier to attract pets to play.4. It can not only be used as a molar stone, but also used for molars of hamsters, gerbils, mice.5. The reasonable length of this molar stone string allows it to be hung in the cage at a comfortable height for birds.Spec:Item Type: Bird Chewing ToysMaterial: Mineral StoneLength: Approx. 19.5cm/7.7in(Hanging Status)Application: For parrots and other small animals to chew.Package List:1 String xBird Chewing Toys