Size: Drill hole diameter 60mm, outer diameter 68mm, height 12mm. Material: The desk hole grommet is made of zinc alloy, which is durable and not easy to rust. The surface of the wire box is treated by drawing process, and the appearance is elegant and modernly decorated. Simple Casting: The hole covers use fine technology, one-piece casting, no splicing, and durability. Removable Center Piece: If you have many cables, you can remove the black plastic center circle to increase the space for you. Usage: You can collect cables in tables and cabinets to keep your desk tidy. The desk cable hole can be used to collect telephone lines, computer lines, audio lines, keyboard lines, cables, or USB cables. Note: The data is all measured manually, please allow 1-3cm error. Due to differences in light and display, there may be some color differences, please refer to the actual item received.