Constructed from high-quality natural wood, without chemicals processing. This Small Animal Exercise Wheel is corrosion-resistant, sturdy, and will last a long time.quiet during training without affecting your pet's sensitive hearing or disturbing you, providing fun for your pet to play and rest. We have developed a double ball bearing to ensure smooth turning with low noise. Our Hamster Running Wheel provides you with a quiet night, even if your little friends train at night on the hamster exercise bike.