Suitable for Various Small Animals : The silent hamster wheel inner diameter is 8.7", the runway width is 3.35" and the height is 10.3". It's reand commended for Chinchilla, Syrian Hamsters, Large Gerbils, Dwarf Hamsters, Rats, Lemmings, Degus, etc. This hamster toys helps hamsters relieve boredom and stay active and healthy. New Premium Bearings : Our hamster exercise wheel uses high-precision bearings to achieve ultra-quiet rotation. Ensures smooth, quiet, and durable operation of the running wheels. These advanced bearings reduce noise and improve wheel stability, providing endless running fun for your hamster while allowing you to enjoy a peaceful night. Durable and Attractive : The hamster treadmill is made of safe, high-quality PC material, the hamster wheel is resistant to gnawing, sturdy, and drop-proof. Its sturdy structure provides quiet and reliable support when running or walking. Available in a variety of colors, it adds a touch of freshness to your pet's living environment. Three Installation Methods : One securely attaches to the side of hamster cages for easy installation; Another features a suction cup that adheres to smooth cage surfaces; The third model incorporates a stable base design. Suitable for various cages, reptile enclosures, and glass tanks, it can also be placed directly on platforms. Clean and Hygienic : The silent hamster running wheels can be completely removed for deep cleaning, leaving no dead corners for feces to hide.