â- 18"-21" adjustable height with height adjustment lever to fit different peopleâ- Pull out the lever for unlockingâ- The rocking function with tension knob (tight & loose) for relaxationâ- Extra lumbar support with adjustable depth and height for added comfortâ- Premium PVC leather and soft sponge for ultimate comfortâ- Hook and loop fasteners for easy detachment and maintenanceâ- Supports up to 330 lbs with 5-claw base and gas liftâ- 5 rolling casters make it easy to moveâ- Clear use