Number of Items:4 Material and Specification: Made of high quality zinc alloy, good comprehensive performance. Removable cover, with an opening hole sleeve, which can open the hole and clip-on top cover, controls the opening size and fits tightly with the cable and wire passing through the hole. Lined with nylon brush in the open to keep your cable away from the metal edge, and protect them from damage. Simple and convenient to install. Effective cable and wire management, hide cables and wires, keep the table clean and tidy, and also be a good decoration.