(2 Wheels Included) Ware Manufacturing's Medium Sized Flying Saucer Exercise Wheels are a great choice for promoting a fun and active lifestyle that will keep your pet happy. Your pets will love the solid running surface which is completely safe for your pets feet and tail. This exercise wheel is amazing and provides hours upon hours of fun. Great for relieving cage boredom your pets will run for hours on this well designed exercise wheel. This Flying Saucer Exercise Wheel is designed to be completely silent during use, which helps keep the noise down from running pets. Ware Manufacturing's Flying Saucer Exercise Wheel is the perfect solution for giving your pet a wheel to run that is safe and silent. Measures 7.25" Width X 7.25" Depth X 4.25" Height