Designed to offer maximum comfort, support and functionality, high-back chair features a breathable mesh back, high-quality fabric seat and comfort adjustments to adapt to nearly every body. The padded, upholstered seat and mesh back give this chair an upscale feel. Defined curvilinear back shape with adjustable lumbar provides total back support. Personal adjustments also include pneumatic seat-height adjustment from 18" to 21-1/2" , seat-depth adjustment, adjustable arms and 2-to-1 synchro-tilt to provide comfort. Seat measures 19" wide x 18-1/2" to 21-1/2" deep. Arms adjust out to 18" wide and up to 10-3/4" high. Back size is 18-1/2" wide x 25-1/2" high. Weight capacity is 250 lb. Black five-star base is made of engineered plastic for durability and is equipped with dual-wheeled casters for easy mobility.