Autism-Products.com proudly introduces the Aeromat Teen/Adult Ball Chair!Combine the benefits of sitting on a ball (sensory integration, balance, postural improvements) with the stability of a chair. The ball is held securely in place by the base (casters included). Use with or without back support. Includes 55cm ball and hand pump. Dimensions: 22“L x 22“W x 31“H, 16 lbs. Floor to top of ball: 24.4“. Color: Black, light assembly required.