... ,aluminum truss 3,different size 4,have a long history base Material 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 * ... Optional.Connection: screw or boltCanopy:sun canopy ,rain canopy. no canopyCertification:CE, TUV, ISO9001 certificatedRemark:we are professional manufacturer of ...