... % balance before shipment)4. Quality: high quality and trustworthy QC staff, strict ... back chair, Headrest&Back:high density mesh, Seat:Flex fabric/PU, Multifunctional armrest, Synchronized -Tilting mechanism, Lumbar height& forward or backward adjustment, Aluminum base.High back chair ... , Headrest&Back:high elastic mesh,Seat:Flex fabric/PU ...