It is a Beam Extrusion/30mm in showcase system. The beam can be connected with other extrusions by tension locks, Z917. It has two grooves where can insert panels. And the edge can be used to put panels or glasses. Its size is30*16mm. Its max length is 6m. It weighs 0.408kg per meter. If you have any other requirements, LingTong will meet your needs. It is made of aluminium. Beam extrusion/30mm is very versatile and practical. It is a multifunctional part. 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.