Description: A pet running wheel is noiseless and stable when running. There are anti-slip lines to prevent slipping during running which makes pets safer and more stable to use. A pet running wheel can help small animals exercise consume part of their physical strength and also play a role in reducing stress and relieving boredom. It is constructed of pp material. This product is available in sizes S M L XL. It is suitable for small pet like hamster squirrel guinea pig etc. Item Name: Hamster Wheel Material: PP Features: Silent Gentle Non-slip Bite-resistant Size Details: S Diameter: 12cm/4.72 (Approx.) M Diameter: 14cm/5.51 (Approx.) L Diameter: 17.5cm/6.89 (Approx.) XL Diameter: 21.5cm/8.46 (Approx.) Notes: 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. Package Includes: 1 x Hamster Wheel (No Bracket)