Stable and Quiet: Double bearing silent design, the base is solid and stable, so it won't disturb the owner's rest even if the hamster runs around freely at night. Maintain Health: Excellent wheels encourage small animals to get enough exercise every day, helping to relieve stress and stay healthy. Height Adjustable: To accommodate pet cages of different heights and bedding of different thicknesses, the wheel can be adjusted to the appropriate height for different environments, allowing small animals to enter and exit safely. Easy to Clean: The simple design and smooth surface make it easy and quick to clean.