... ,have a long history screw truss,hose truss.aluminum truss,roof trussMaterial size details: 150*150mm,200 * 200mm,300*300mm, 400 ... the standard aluminum alloyFrame :4,3,2Type: 4,3,2.Material: Aluminum 606,160,636,082Head (diameter * thickness): 50 * 3mmInclined tube ... number is 0086-13662486584. screw truss,hose truss.aluminum truss,roof truss