Description: Made of material effectively preventing from biting. Round design makes stable and . Provide a good temporary holding area for your pet when your pet house. Provides interactive fun for the pet and the pet owner make your . With this exercise ball your small no longer be to the small cage it can effectively increase their activity space. Perfect for dwarf hamsters sugar gliders ferret and other small animals. Specification: Material: Diameter of Ball: Approx.4.72inch Package Includes: 1 Piece Note: Since the size above is measured by hand the size of the actual item could be slightly different from the size Due to the lighting effects monitor settings etc. There could be someslight difference in the color of the pictures and the actual item.