[Material] Made of high-quality wooden materials, environmentally friendly, non-toxic, and safe for pets. [Exercise toys] can help your hamster exercise and enhance balance and agility. [Sturdy support] By providing reliable and stable installation for the exercise wheel, the thickened and thickened wooden base can greatly avoid reversing. [Multiple functions] Not only can it be used as a fitness toy for small pets, but it can also be used as a chew toy with excellent pet teeth grinding effect. [Completely silent] The wooden wheels have no noise, and pets will not disturb you when they play, providing a fun place for pets to rest and entertain. specification: Material: Wood Color: as shown size: Length x width x height: 6.09x3.54x7.07inch / 15.5x9x18cm Wheel diameter: 5.9 inches / 15 cm Outer rim width: 2.28 inches / 5.8 cm Inner wheel width: 1.97 inches / 5 cm feature: Sturdy work surface, better grip Provide exercise wheels for small animals to promote production and digestion. The workmanship is fine and you can climb the ground safely and comfortably. Very suitable for hamsters, mice and other small furry animals. Keep your pet quiet when exercising, it will not affect the pet's fragile hearing, and will not cause interference to the owner. Package contains: 1 x pet fitness wheel notes: 1. Please choose the right size according to different animals. 2. It can be wiped with a wet towel or wet paper towel, but not soaked in water. 3. Due to manual measurement, please allow an error of 1-3mm. Please make sure you dont mind before bidding. 4. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thank you