1) tube material:alloy aluminum 2) plastic material:pp 3)two-section to five-section tube material:alloy aluminumplastic material:pptwo-section to five-section open illustrationmechanical device with pushing button lock The main product includes:trolley,cart,drawbar,suitcase,wheel,luggage,handle,pole,bar,foot,standfoot,accessory and so on 980 luggage trolley