The Venice has a tilt lock mechanism and tension control handle to allow synchronised movement. Quality mesh and black fabric along with a heavy duty moulded foam. The adjustable Lumbar support adds to the great value of the Venice chair.Mesh Back 5 Year WarrantyTilt Lock Mechanism120kg User LimitPolyurethane Adjustable ArmsAdjustable Lumbar SupportHigh Arch Base Gas Height AdjustmentUNIT:Each