... :30am-9:30 pmHigh back chair, Headrest&Back:high density mesh, Seat:Flex fabric/PU, Multifunctional armrest, Synchronized -Tilting mechanism, Lumbar ... backward adjustment, Aluminum base.High back chair, Headrest&Back:high elastic mesh,Seat:Flex fabric/PU Multifunctional armrest, Synchronized -Tilting mechanism, Lumbar ...