It is a Bottom Corner for Showcase/90° in showcase system. The component is used at the corner where the two extrusions are connected vertically of the bottom of a showcase. The main function is to make the use of the middle screw hole to assemble castor. After assembling castor, the showcase can be pushed freely. It weighs 0.076kg per each. The diameter of the screw hole is 8mm. It is made of zinc. 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.