Extremely Good Air Permeability: Comfortable drafting chair with mesh back, will promote air circulation, allowing you to sit cozily for long hours. Built-in lumbar support helps prevent back strain and muscle fatigue. Multi-function adjustment: This tall office chair has many adjustable features to ensure you to find a good seat position. Adjustable seat height, foot ring and armrests could be easily up and down during busy working time. Comfortable Features: This tall table chair swivel a full 360?? for reaching and moving between different areas around you, allows you to sit comfortable with a suitable position to improve your posture and overall health while working. The durable nylon base is heavy duty design to ensure safe for whole-day use. Smooth Rolling Casters: Our drafting chair comes with safe, multi-direction casters that allow you to easily move the chair around with zero effort. Soft PU material casters can protect your favorite hardwood floor, carpets and other mats, ensure smooth and quiet moving on any surface. Warm Tips: We provide you with installation in the box. The instruction is very simple to follow, no extra tools and fittings needed. The computer task chair can support up to 300 pounds. Within 12 months, for any product problems, please feel free to contact us and we will solve it for you. Overall Dimension: 25.5"x 25"x 52.75"