Runtz Ball Chair, Backless, Supports Up to 250 lb, Green Vinyl Seat, Silver BaseRuntz ball chairs are a unique seating option that helps to encourage active movement as well as better posture and balance. Specially designed for children, this chair is great in school or home settings as well as waiting rooms. Supported by four legs to provide a sturdy base during movement. Legs are powder coated for long lasting durability and to provide resistance against chipping and scratching. Fully inflated, seat height is 17" and will lower