Argomax Mesh Ergonomic High Back Executive Office Chair of 3D Armrest (EM-OC002) Not only offer you a relaxing working environment But also make your workplace look more fashionable You can adjust angle of chair back when you rest, enjoy your break time S-type backrest ergonomic,more comfortable Size:10.2*18.9*53.5&#034; Steel body Aluminum alloy leg Engineering plastic package edge PU mute wheel Makes your body breath whole day and possess heavier bearing as well as easier to be washed Gentle care of your neck More security and reliable All of chairs passed BIFMA TEST as well as SGS TEST for its gas spring which convenient for using.