Giantex Modern Ergonomic Mesh High Back Executive Computer Desk Task Office Chair (Black) 360 Degree Swivel Wheel And Chair Can Run Smoothly On Floor Adjustable Seat Height For Best And Comfortable Sitting Posture;Height Adjusted By Pneumatic Gas Lift Color:Black+Purple/White/Black/Green/Gray/Purple Load Capacity: 264 LBS Overall Dimension:24.8"X25.9"X46.4"- 51.1";Backrest Size:19.8"X 31.4";Seat Size: 19.6" X 20.4";Adjustable Seat Height: 18" To 23.2"