YSP1000 Features: * Rainbow run about ball * Provides interactive fun for the pet and the pet owner * Sized perfectly for hamsters and gerbils, provide the perfect outlet for your pet"s excess energy * For added safety, use your run about ball on super pet"s Hamtramck raceway and provide your pet with a controlled exercise environment * Makes a great temporary holding area to keep your furry friend while you clean their home * Diameter: 7 Options: * Available in four colors Color/Finish: * Rainbow balls come in six fun assorted colors (Tangerine, Blueberry, Watermelon, Grape, Lemon, and Lime)