... ,different size 4,have a long history bule cover truss,roof truss,aluminum truss Material size details: 150*150mm,200 * 200mm,300*300mm, 400 ... ) 30 * 2mmSingle length: 1m, 2m, 3m, 4m,Style:straight frame, round frame, arc frame Color: Optional.Connection: screw or boltCanopy:sun canopy ,rain ...