Features: Bring so much running happy to your little hamster, even as your hamster runs around the track and the hamster wheel . Your furry pet will love our hamster wheel toy because hamsters love a hamster wheel like a runner to help break boredom and enrich their evenings, and also get them exercising to maintain their strength. Reasonable size running wheel and wide track bring a relaxed back feeling as they don't need to bend their back while running, allowing them to enjoy happy running time, helping them build their muscles and making them happy & mentally healthy. This sturdy base makes it easy to use at cages, glass tanks or put them on platforms. Colorful pc, with high transparencyand chewiness, the stand enables reliable standing and support while running or walking. Specifications: Component: PC Diameter: Approx.17cm/6.69in Wheel Width: Approx.2.95inch Color: 5 Option Type: With Base Package Includes: 1 pc Hamster Running Wheel note: 1.Please allow 1-2cm errors due to manual measurement, note that you donot mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.