... working platform-aluminum mast1)CE certification2)Double thicker mast3)Height:9m-20m(two masts can reach 20m)4)Motor,hydraulic systerm ... )ISO certificates,Motor,hydraulic systerm imported from USA ,Most competitive priceLight-duty double masts aerial working platform:Double masts aerial ... and driving wheel, will charge plus. Can match with hydraulic frame and driving wheel: There is the manual lowing ...