It is an Upper Track Extrusion in showcase system. When there is needed to install sliding doors, E405 can be used as a track. E405 is inserted into the groove of extrusions and equipped with E406 to make the door slide. There are two tracks for two doors. Its size is 16*12mm. Its max length is 5m. It weighs 0.136kg per meter. If you have any other requirements, LingTong will meet your needs. It is made of plastic. 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.