Made of high quality TPR material(Thermoplastic Rubber), environmentally friendly and non-toxic. It won’t be digested if pet eat by mistake, it will be excreted out. No worry about your pet’s health and life. Concave - convex perfect fits your pet’s teeth and effectively clean pet’s teeth. Helps massage pet’s teeth, fresh breath and keep teeth healthy. Dumbbell design and built-in squeaker, it will squeak when pet squeeze it, which can attract dog’s interest. Long-lasting accompany with your pets, reduce pet’s loneliness, depression and boredom. Best for small, medium and large dogs teeth cleaning, training and playing.