Dog Toy -Silent Hamster Running Wheel Mouse Mouse Activity Toy Type One Highlights Brand Generic Silent Hamster Running Wheel Mouse Mouse Activity Toy Type One Description: Made of wood material, safe, non-toxic, durable. 100% calm and no noise. Easy to install clean and odor resistant. Waterproof, Anti-mite, High hardness, Hard to crack, Zero formaldehyde, Paintless Encourage hamsters, mice, gerbils and other small animals to enjoy healthy exercise. Specification: Material: Wood Size: Approx. (DxW) 19x7.3cm / 7.48x2.87inch Package includes: 1 hamster running wheel Note: Please allow 1-2cm error due to manual measurement. The picture may be slightly different from the actual object due to various factors.