Usage Tips: Quantity: Pack of 6 Black Cable Management Grommets; Material: Made of sturdy plastic, more durable Desktop hole grommet: Mounting hole diameter: 45mm; Overall dimensions: 51 mm x 20 mm (maximum diameter x height) Removable edge: has a small open hole for threading through and keeping them tidy; the lid is removable, so if you have a lot of cables, you can use the desk grommet without the lid Desk Grommet: Allows you to route your cables neatly across the top of your desk, creating an organized environment look and keep cables tidier in desks and work areas Application: Desk cable grommet neatly organizes cables of desktop computers, PC peripherals, office equipment , entertainment systems for home, office and school