The Deluxe Air Grid Back Chair offers a modern style and multiple ergonomic adjustments to keep you more comfortable while working. Breathable Dark Air Grid Back is equipped with built-in lumbar support. To further your comfort, this office task chair features a thick padded seat and polyurethane arms that adjust in height and width. Seat slider allows you to adjust the depth of the chair to meet your needs. Chair also features pneumatic seat-height adjustment from 19" to 23-1/2". The heavy-duty, angled nylon base is equipped with oversized, dual-wheel carpet casters. Seat measures 19-1/2" wide x 20" deep x 4" thick. Back size is 20" wide x 19" high.