Description : Specially designed for quiet running Wheel does not affect the owner &# 39 ; s sleep . Made from high grade strong and durable enough to bear your pets weight . Provide your small pet with a safe environment in which to exercise and play . Practical Exercise Wheel - Avoids your pet becoming overweight or obese so as to keep it . Suitable for hamsters mice gerbils or other small animals . Specification : Material : Environmental Protection Plate Size : Approx . 21x16x22cm / 8 . 27x6 . 30x8 . 66inch Wheel Diameter : Approx . 21cm / 8 . 27inch Pink Colorful Package Includes : 1 Piece Hamster Exercise Toy Note : Due to the light and screen setting difference the item &# 39 ; s color may be slightly different from the pictures . Please allow slight dimension difference due to different manual measurement .