It is a Bottom Track for Sliding Door in showcase system. When there is needed to install sliding doors, E422 can be used as a track. E422 is inserted into the groove of extrusions and equipped with E421to make the door slide. There are two tracks for two 5mm doors. It needs to hold E472 to work together. Its size is 16*8mm. Its max length is 5m. It weighs 0.135kg 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.