... :300x300mm,etc 4.wedding roof truss,lighting truss square screw truss system detail: Truss Material: Aluminium6061-T6 or ... show, concert, event etc. Finish in a spigot or screw as your request. Convenient for set up and transportationWeight Capacity ... stage,adjustable stage,chorus stage, assembly stage,folding stage,bleachers seats,layer truss,background truss,speaker truss,LED truss,scaffolding, ...