... stage or truss booth aluminum trussmaterial: 6061. T6size: 20*20cm/30*30cmISO 9001:2008Size and specifications: 20X20cm, tube size 30mm, thickness 2mm ... : outdoor background, small span tent, truss boothSize and specifications: 30X30cm, tube size 50mm, thickness 3mmlength: per as requested, 1m, 2m or ... factory help to install outdoor Music show at TV tower: aluminum truss