Quantity - Comes with 12 plastic desktop hole covers that fit a 50mm (2") diameter hole for wire management. (Please receive promo code on product page when ordering) purchase to get a better price.)Desk Hole Grommet - Material: ABS; Overall diameter: 63.5mm/2-1/2"; Height: 20mm/4/5"; Mounting Hole Diameter: 50mm/2" Detachable Wire Grommet - With an opening hole sleeve that can open the hole and the snap-on top cover, controls the size of the opening and snugly fits the cable and wire going through the hole. Easy Installation - Start by drilling a hole, then place the main part of the washer directly into the hole and begin to hide all the cables and wires.Efficient Cable Management - Neatly organize cables from computer desks, PC devices , office equipment, home, office and school entertainment systems Note: The data are all manual measurement, please allow 1 - 50cm error, due to of the light and display difference, there will be a certain color difference, depending on the physical object received.