Product Material: The thread grommet cover is made of zinc alloy, waterproof and rustproof, no deformation, durable, smooth surface easy to clean. Dimensions: Computer wire hole cover mounting hole diameter 50mm, outer diameter 56mm, through hole 19.5 x 17.5mm, height 15mm. Keep Desktop Clean: With the threading box, you can collect wires and cable routing in the table and cabinet, keep your desktop and wall clean and tidy. Multi-function: The hole cover cable passage can be used to collect cell phones, telephone lines, tablets, mice, keyboards, headphones, USB cables or wires. The cover can be removed: Cable passage has a removable cover equipped with a brush at the entrance, by turning the cover, you attach it to the inner ring to prevent unwanted infiltration of dust and mud. Features: The table grommet is mainly composed of three parts: outer ring, removable cap and built-in rubber seal. The removable cover plate is additionally equipped with a brush at its opening to prevent the ingress of dust and dirt. Turning the cover attaches it to the inner ring, which prevents cables from slipping out or moving the cover. Specification: Material: Zinc Alloy Colour: silver Weight: 90g (2 Pieces Cable Hole Cover) Outside diameter: 5.6 cm Drill hole diameter: 5cm Exit opening: 17.5 x 19.5 mm Depth: 1.5 cm Scope of delivery: 2 x cable grommets