This type truss is a small conical coupler one made in our factory, adopting middle type conical connector, connect a conical spigot in the middle, use incl.R spring to fix. This product is light, easy to transport, favorable price,  install agilitily.The height is 1m, 2m, 3m.Be the same with hanging painting background, ad truss, small loading exhibition truss. Usually adopt T6061 type aluminum material, main tube is φ30*3mm,brace tube is φ16*2mm.