United Chair High Back Mesh PU Swivel Office Chair with Headrest, Grey (8097) Adjustable armrests provide optional support for your elbows and forearms, help relieve shoulder strain Synchronous mechanism, with excellent lumbar support Pneumatic seat height adjustment, adjustable tilt tension control and 140 degree wide recline angle Original clipper-built ergonomic designed mesh back and padded fabric seat Strong 5 star metal foot with pulley lead 360 degree swivel