Color: Gray Item dimensions: L x W 13x13 centimeters Super Quiet Hamster Wheel: The quiet hamster wheel design brings endless running fun for your little hamster. Even if your hamster runs on the track and spins the wheel, it will give you a peaceful night. A must-have accessory for hamster cages: Furry animals, because hamsters like hamster wheels like runners, to help them get rid of boredom and enrich their night life. You can continueexercise to maintain physical strength. Comfortable Hamster Wheel: Reasonable drum size and wide running track make your back feel relaxed as they don't have to bend their back while running, so they can enjoy some running timeendlessly and helps them tone their muscles and stay happy and sane. Durable Toy: The wheel is made of high quality acrylic and plastic, strong and lightweight, durable and long lasting. Suitable for hamsters, guinea pigs, chinchillas and other small animals. Pretty decoration: Can be used with the stand or installed on the side of the cage for decoration, easy to use. The detachable bracket and wheel design make it easy to disassemble and use.