Nucleus has smart seating down to a science. With its deep-cushion hammock seat designed for even weight distribution, breathable four-way stretch mesh back & easily adjustable lumbar support, the Nucleus Task Chair KD is ideal for anyone who demands intuitive performance, all-day comfort & superior support. Streamlined profile delivers sleek style to any office or collaborative environment. Arms adjust in height & width. Functions include pneumatic seat-height adjustment, 360-degree swivel, seat glide, synchro-tilt, tilt tension & tilt lock. This knock-down version with fabric-upholstered seat requires arm, back & cylinder assembly on site.