Part of the Mayline Technical Series, this swivel task stool features an inflatable lumbar support that is orthopedically designed to give a customized adjustment. Swivel seat with pneumatic height-adjustment is upholstered in a durable acrylic/poly blend. Seat also adjusts in depth. Back adjusts in height. Height-adjustable footring twists and locks into place. Five-star base is equipped with dual hooded casters. Weight capacity is 250 lb. T-shaped, height-adjustable arms are sold separately.