Exercise Has Never Been So Glamorous! A Fun And Safe Way For Your Little Pet To Explore And Exercise. Features: - A Safe And Secure Way To Let Your Pet Explore And 'Stretch Their Legs'. - Made From High Quality, Recycled, Shatter-Resistant Plastic With Added Glitter. - Easily Assembled By Clicking The Two Halves Together. Doors Unlock By Twisting Anti-Clockwise. - Ventilation Slits For Good Air Circulation. - Made In United Kingdom. - Approximately Diameter: 7 (18 Cm) "