Clearance! Work4U-MC-ZY003 Ergonomic Mesh High Back Multifunctional Swivel Office Chair, Desk Chair, Task Chair, Computer Chair, Black High standard back Mesh & 3 Inch thick Seat Mesh to prevent body heat and moisture build up 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, 140 degree wide recline angle High quality 350mm Painting Base and 50mm Nylon Casters