HON - 7800 Series High-Performance Mid-Back Task Chair, Tectonic Black - Sold As 1 EachWave-formed seat cushion distributes weight across a broader surface area, reducing stress on pressure points. Lumbar support applies consistent, gentle pressure to the lower back, encouraging a proper curve. Upholstery contains stain-resistant protection to maintain a clean appearance. Seat/Back Color(s): Black; Features & Functions: 360° Swivel; Asynchronous Control; Back Height Adjustment; Pneumatic Seat Height Adjustment; Seat Glide Mechanism; Tilt; Tilt Tension; Arms Included: Yes; Recommended Applications: Task, Multi-Task & Task Intensive.Wave-formed seat cushion distributes weight across a broader surface area, reducing stress on pressure points.Lumbar support applies consistent, gentle pressure to the lower back, encouraging a proper curve.Upholstery contains stain-resistant protection to maintain a clean appearance. Includes one chair with arms, base and casters.