Commercial Grade Rating - Designed specifically for commercial usage, this chair meets the demands of a professional environment while ensuring comfort. Breathable Air Grid Seating - The seat and backrest feature a breathable air grid material that promotes airflow, helping to keep you cool and comfortable during long hours of sitting. Customizable Lumbar Support - Equipped with adjustable lumbar support, this chair allows you to tailor the back support to match your individual posture and comfort needs, reducing fatigue over time. One-Touch Pneumatic Seat Height Adjustment - The one-touch pneumatic mechanism allows for swift and effortless adjustment of the seat height to accommodate various desk heights, making it easy to find your perfect seating position. 2-to-1 Synchro Tilt Mechanism - Experience enhanced comfort with the 2-to-1 synchro tilt control, which allows the backrest and seat to tilt in unison. Additionally, customizable tilt tension allows for personalized reclining experiences. Height Adjustable Armrests - The chair features height adjustable armrests that can be modified to your preferred position, topped with soft polyurethane pads for additional arm comfort. Gunmetal Finish Aluminum Base - The robust base is constructed from gunmetal-finished aluminum, combining durability with a sleek aesthetic. Dual-wheel carpet casters complement it for smooth mobility on various surfaces. Greenguard Certification - This chair meets stringent indoor air quality standards, as certified by Greenguard, ensuring a healthier workspace free from harmful chemicals. Finish: BlackStyle: ContemporaryMaterials: AirGrid®/MetalDimensions:Overall: 28.5"W x 27"D x 44.5"HSeat Size: 21.75"W x 20.5"DSeat Height: 17.5 - 21.75"Back Size: 21.5"W x 24"HWeight Capacity: 250 lbsLimited lifetime warranty from Office Star. These Office Star mesh desk chairs normally ship in 2-3 business days from our CA or NJ warehouse.