Convergence is the ideal chair for any office - a one-seat solution that can do it all. Intuitive, adjustable lumbar support provides lasting comfort during long workdays. It puts just the right amount of pressure on the lower back. With a clean, modern finish, the breathable mesh back panel in black flexes and responds to your movements. Swivel-tilt control lets you recline comfortably. The 3" thick seat cushion takes the stress off the lower body throughout the day. Arms adjust in height and width to put the support right where you need it. Other functions include pneumatic seat-height adjustment from 15-3/4" to 20" , swivel and tilt lock. Easily move from workstations to conference rooms using the integrated, full-width handle across the top. Durable frame with a 275 lb. capacity sits atop a sturdy, five-star base equipped with hard casters that move effortlessly on any surface. Seat in black fabric upholstery measures 20" wide x 19" deep. Back size is 18" wide x 22" high.