Product diameter: 17.5cm/6.9inch. 1 silent hamster wheel (stand not included), perfect size for hamsters, gerbils, mice or other small pets. Made from high quality plastic materials, lightweight, yet strong and durable , beautiful and exquisite. Detachable design makes assembly easy. Safe wheel for pets toes and tails. 6.9 inch super quiet hamster wheel - Silent spinning hedgehog wheel brings your little pet endless running happiness, won't disturb your sleep, even your hamster on the race track to run and the hamster wheel spins all night. Perfect hamster cage accessories - Your furry critter will love this hamster wheel toy hamster and it helps them break boredom and enrich their night, also make them exercise to maintain their strength Easy to clean and nice gift choice - The rotating drum of the hamster wheel is made with acrylic material, it is easy to clean, please use a clean damp cloth to wipe it if necessary. it is also a good gift choice for your hammy or family members/friends' pets.