... & store. 3. Strong loading capacity. 4. competiv price 300*300mm aluminum box truss, spigot truss, stage truss Item No ... 20*2mmConnectorConical coupler Truss length (m)23467 8910Point load (kg)610545490395355325300275Distrib.load(kg/m)68243829514286735041*Note: (1)1m=3 ... .28ft, 1kg=2.20lbs Available size for you to choose150*150mm, 200ml*200ml, 250*250ml, 300 ...