Quantity: 6 Pack Black Grommets for Wire Management; material: made of sturdy plastic, more durable Desktop hole grommet: mounting hole diameter: 45mm; total size: 51 x 20mm (max. diameter x height) Removable rim: has a small open hole to pass the wires through and keep the wires more neatly; the lid is removable, so if you have a lot of cords, you can use the desk grommet without a lid Desk storage grommet: allows you to thread cords through the top of the desk conveniently orderly, creating an organized look and keeping cords more tidy in desks and work areas Application: The desk cord grommet neatly organizes wires from desktops, laptops, PC peripherals, office equipment, home, office and school entertainment systems Due to factors such as manual measurement and display differences, there may be slight differences between individual products and images, please excuse me.