speaker truss 1.truss system for speaker with 400*400mm spigot truss 2.10m ... 4mSelf-weight 8.6kgMaterial Aluminum alloy,6061-T6 with 16 hardnessMax load900kgMax span20mMain tube50*3.0mm/50 ... to lift and hang light2. .Giving the truss system you wanna, length, width, height, if give ... produce team, good welding with good weld joint2. TUV tested with certificate3. OEM with best price 4. Fast delivery ...