Comfortable, Secure Positioning: The High-Low Chair is a sturdy and comfortable seating system which is also a colorful and cheerful addition to any environment. It utilizes a pneumatic cylinder so that the seat height can be easily adjusted with a single lever. Plus, the seat and its frame detach easily from the pedestal base, converting the chair to a floor sitter. Tumble Forms Medium Feeder Seat can be attached to base and converted to a High-Low Chair. To hold the child comfortably in midline, the High-Low Chair features a washable cotton quilted trunk support, shoulder straps and a hip belt. The unique segmented design of the seat back allows the trunk support and the shoulder straps to be placed at just the right position on the child. Comes with removable abductor. More than Just a Seating Device: The High-Low Chair features tilt-n-space adjustment, which enables the chair to be used for educational and social activities as well as for mealtime. It includes a durable melamine tray which remains securely in place with a quick-release locking lever. This chair is designed for children measuring up to 45" tall.