[MATERIAL]Made of high quality wood material, eco-friendly, non-toxic and safe to your pet. [EXERCISE TOY]Helps your hamster exercise more and develop balance ability and agility. [STURDY SUPPORT]Widened and thickened wood base greatly avoids reversal through providing reliable and stable mount for the exercise wheel. [MULTIPLE FUNCTION]It not only serves as exercise toy preferred for small pet sports activities but also as chew toy, offers excellent pet teeth grinding effects. [COMPLETELY NOISELESS]The wooden wheel is noiseless, when pets play with this wheel, it will not disturb you, providing a funny place for pets to play and rest. Specifications: Material: Wood Color: As shown Size: LxWxH: 7.86x4.72x9.24inch / 20x12x23.5cm Wheel diameter: 7.86inch / 20cm Wheel external width: 8cm Wheel inner width: 7.2cm Features: Solid running surface for better grip. Provide sports wheels for small animals to promote production and digestion. With fine workmanship, the surface is safe and comfortable to climb. Great for hamster, mouse and other small furry animals. Keeping quiet while the pet is exercising which does not affect the pet's fragile hearing, nor does it cause distraction to the owner. Package Included: 1 x Pet Exercise Wheel Notes: 1. Please choose the right size according to different animals. 2. It can wipe with wet towel or wet towel paper but not wash soaking water. 3. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. 4. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you