... section:300x300mm,etc 4.wedding roof truss,lighting truss new design screw truss detail: Truss Material: Aluminium6061-T6 or 6082-T6 ... section Shape: square, triangle, layer,circle ,etc.Application:We can design diverse shapes to hang acoustics,speaker, lighting and so on ... truss,background truss,speaker truss,LED truss,scaffolding,DJ flight case,aluminum bar desk,scaffolding,and so on.