... Strong loading capacity. 4. competiv price 2012 hot sale 500*600 aluminum spigot truss, box truss, stage truss Item No.CK ... -5060VSize500*600mmSingle Length1m2m3m4mSingle weight13.1kg21.5kg29.9kg38.3kgMaterialAluminum alloy 6061-T6Main Tube(diameter*thickness) 50*3mmVice Tube(diameter* ... 300*300ml, 350*350ml, 400*400ml, 500*600ml, 520*760ml, 600*760ml Available length of one piece for you to choose ...