Uncaged Ergonomics ATC-b Active Task Chair with Balance Seat and Auto-Locking Casters, Black

• Armless desk chair – helps you strengthen your posture without slouching and saves space over a clunky ergonomic desk chair; ideal for home and office desks ;• Special balance seat – looks and feels like a normal armless office desk chair but its hidden balance seat gives you the freedom to rock, tip, twist, balance, and fidget the day away – like an ADHD desk chair!;• Sit higher – sitting higher facilitates movement and encourages you to stand more; height-adjustable from 19.5 in. to 23 in.;• Durable base – 360deg swiveling base with 5 auto-locking casters;• Aesthetic – black desk chair fits the decor of any desk;• Quick and easy to assemble in 4 simple steps, no tools required;• Weight: 12 lbs.;• Includes manual;