Upgrade your office space with this Herman Miller Aeron office chair and Seeknow lumbar support. The chair is designed for maximum comfort and style, with ergonomic features that provide support for long hours of sitting. The sleek and modern design fits perfectly in any office or home workspace. The brand is known for its high-quality products that last for years, making it a wise investment for any business or individual. The chair is perfect for those who want a comfortable and stylish seating solution, without compromising on quality. The chair is in excellent cosmetic and functional condition. It is model B (which is the medium size). Lean Back tension Adjustment. Seat pan tilt Adjustment.