... aluminum alloy back base. MOQ: 10pcs High Quality Ergonomic Office Mesh Chair : MI Item No.MISites Applicableoffice areas as offices ,clubs ... PU or high-quality first-layer cowhide leather,mesh fabric,nylon.Base PlateIt can be tilted at ... Of Leather/ Cloth Cover Is Optional .2. Different Mesh Back Can Match With Any Backrest . More Styles: Ergonomic Office Chair,Office Mesh Chair,Task Chair