... , concert, advertisement, indoor or out door celebration and so on. 2.ALUMINUM SQUARE SPIGOT TRUSS 1.>Lighting truss/tower truss/stage ... 4.Material:6061-T66082-T6Imported welding rod 5.Length available:0.5m,1m, 1.5m,2m, 3m, 4m 6.Size available ... ):20*2mm & 25*2mm 7.packageShipping carton, cardboard, bubble membrane Hot sale stage truss,truss,speaker truss