1. Precise carving and polishing process, smooth and burr-free, to ensure the safety of animals 2. Natural wood, safe and non-toxic, suitable for small animals to bite 3. Suitable for a variety of small animals, birds, rabbits, hamsters, etc. 4. Material: wood 5. Features: easy to install, safe and durable, non-toxic 6. Function: protect hamsters teeth and promote tooth growth 7. Specifications: a set of 11 8. Weight: 500g (one set)