It is a Beam extrusion/25mm in showcase system. The beam can be connected with other extrusions by tension locks. It has no groove where can put panels. The edge of the beam can be used to put panels or glasses on it. Its size is 25*16mm. Its max length is 6m. It weighs 0.427kg 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.