Niteangel Wooden Interactive Toy Ball for Small Animals, Chew Toy for Hamsters, Guinea Pigs and Rabbits Develop the intelligence and imagination of pets. Special shape design, small animal ball toy. Durable natural wood, and non-toxic, provides hours of fun for your small animals. Suitable for rabbits, guinea pigs, hamsters, gerbils, chinchillas, rats, or other small animals. Dimension: 3.9 x 3.9 x 3.9 inches,Hole diameter:1.6inch.