http://tinyurl.com/p4uxnj9
Color-Furniture Modern Fashion Design Office/computer Chair Nylon Base with Dual Wheel Carpet Casters for Home Office (Purple)
Pneumatic seat-height adjustment for easy positioning
Heavy Duty Nylon Base with Dual Wheel Carpet Casters
Strong 5castor-wheel Chrome base lead 360 Degree Swivel.
Ergonomically designed for comfort for those who work at desks for long periods.
Size : 23.2"x31.9"x36.2"-40.9"; Maximum holding weight: 150KG