Living World?s Deluxe Exercise Wheel for guinea pigs has a wire grid pattern that provides additional safety over traditional exercise wheels. In addition, it has a specially-designed stand that helps prevent small pets from getting caught between the stand and the wheel. The epoxy-coated, rust-resistant Deluxe Exercise Wheel is easy to clean. An exercise wheel is excellent for stimulating exercise activity and relieving boredom. For Guinea Pigs. Other sizes available : 61701 Living World Deluxe Exercise Wheel for Mice 61706 Living World Deluxe Exercise Wheel for Hamsters,