Managerial mid-back chair with active lumbar support features a mesh screen back. Mesh screen back provides increased breathability while adjustable padded lumbar support maintains the natural curve of your spine. Functions include one-touch pneumatic seat-height adjustment – 360-degree swivel – tilt – tilt tension – tilt lock – and synchronized knee tilt (2-to-1 synchro tilt). Mid-back chair features a thickly padded contoured mesh seat and height-adjustable arms with soft pads. Seat size is 20″ wide x 19-1/2″ deep x 3″ thick. Back measures 22-1/2″ wide x 25-3/4″ high. Distance between arms is 19″. Heavy-duty metal base has a five-star design and oversized – dual-wheel carpet casters.