Enriching your pet's daily life starts with supporting natural behaviors such as exploring, playing, hiding, and chewing. Oxbow Enriched Life is designed with these natural behaviors in mind and is constructed from 100% pet-safe materials, allowing you to nurture your pet's mind and body in safe and fun ways every day. This super silent 8" wheel is ideal for dwarf hamsters & mice. The stand can be removed to attach to the habitat and the running track is feet friendly.