MaterialPlastic ColorBLUE Target SpeciesGuinea Pig, Mouse, Squirrel, Gerbil, Hamster, Chinchilla EASY TO CLEAN: This hamster flying silent spinner saucer wheel toy is super easy to clean and you can even slip it in your dishwasher, and resistant to odors. SIZE & SUITABLE: This hamster flying saucer wheel diameter is 7.09inch/ 18cm, height is 4.33inch/ 11cm, suitable for small animals, such as hamster, chinchilla, gerbil, rat, chipmunk, squirrel, guinea pig and so on. ENSURE SAFETY: This hamster flying silent spinner saucer wheel with anti-slip screw thread can protect pets from tumble due to inertia when they are playing, this solid non slip running surface is safe for pet's feet, and won't hurt the pet's tail. SILENT DESIGN: This hamster flying saucer wheel with ultra-quiet design, and smooth intimated edge of running wheels, it won't produce noise when played at night, you can sleep a few feet away from your hamster s cage and you ll not be disturbed byany noise. BEST GIFT: The flying saucer exercise wheel is here to keep your hamster entertained for hours due to its fun design, provide small animals with a lot of interesting daily sports, such as playing, jogging and running, promotes exercise leading to a happyand healthy pet.