It is a Beam extrusion/40mm in showcase system. The beam can be connected with other extrusions by tension locks . It has one groove where can insert panels. The edge of the beam can be used to put panels or glasses on it. The beam has a good-looking appearance that is a round top. Its size is 40*16mm. Its max length is 6m. It weighs 0.632kg per meter. If you have any other requirements, LingTong will meet your needs. It is made of aluminium. The products of LingTong are green and environmentally friendly. If there are some relative needs, LingTong will provide the best service for you in exhibition construction.