Upgrade your office seating with this modern desk chair from Office Star. The built-in lumbar provides comfortable support to your spine and lower back to help reduce pain and fatigue. Utilize seat height, back height and armrest adjustments to customize your seat. Recommended for performance use 6-8 hours per day. Weight capacity tested to support 275 lb. Overall Dimensions: 39”H x 26-1/2”W x 25-1/4”D. Mid-back office chair. Saddle seat with foam padding. ProGrid mesh upholstery. Lumbar support. Waterfall seat. 1-touch pneumatic height adjustment. Ratchet back height adjustments. Mesh-back office chair with height- and width-adjustable armrests. 360 swivel. Modern desk chair has rolling wheels. Assembly required. Backed by the manufacturers 1-year limited warranty.