Aluminium truss: Ladder truss, triangle truss, box truss(square truss), length on 0.5m /1m/1.5m/2m/2.5m/3m/3.5m/4m, aluminium type 6082-T6, main pipe 50mm and thickness of 3mm or2mm, 4mm. 1)Exhibition truss: 200mm*200mm/250mm*250mm 2)Stagetruss: 300mm*300mm/350mm*350mm/400mm*400mm/450mm*450mm, 290*290mm/287*287mm/387*387mm/350*350mm/470*470mm 3)Heavy duty truss: 470*470mm/ 480*670 mm/ 520mm*760mm / 530*530mmm