Usage Tips:[Premium Material]: These grommets are made of durable matte metal, with excellent manufacturing technology, smooth and bright surface, easy to clean, waterproof, compression, compression and corrosion resistance. [Flexible Size]: The ring can pass through any cable with a diameter of up to 1.5 inches (1.5 inches). The plastic cover is removable. If there are many cables, you can use a table without a plastic cover for sealing. [Easy to Install]: The inner diameter of the metal desk gasket is 60mm, the outer diameter is 68mm, and the height is 12mm. You only need to drill a hole to insert the product and install it quickly and easily. [Convenient and Neat]: The 60mm table joint allows you to use multiple cables in any direction, which is an effective way to organize the table and keep the cables on the table and work area clean. [Widely Used]: The desk grommet cap can be used to pass through everyday telephone lines, tablets, PC peripherals, office equipment, home entertainment systems, office and school.