Description: Specially designed for quiet running Wheel does not affect the owner s sleep. Made grade strong and durable enough to bear your pets weight. Provide your small pet with a safe environment in which to exercise and 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 Color: Blue Pink Colorful Package Includes: 1 Piece Hamster Exercise Toy Note: Due to the light and screen setting difference the item s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.