1,aluminum truss,spigot truss, 2,different size 3,light truss,stage ... ,450*450mm,500*600mm, 520*760mm,600*760mm etc.spigot to connect the standard aluminum alloyFrame :4,3,2 ... frame, arc frame Color: Optional. Connection: screw or bolt,spigot Canopy:sun canopy ,rain canopy. no canopyCertification:CE, TUV, ISO9001 ... set up and remove and moveable many side spigot truss connection,bolt truss connection,