What is this?Table cord grommets can smartly organize wires. It is widely used for the computer desk, the background wall, the cabinet and so on.What will I get?The desk grommet, we provide here, is in the size of: Round Grommet Drill Hole: 24.5mm / 0.96-inch; Fit for Plate Thickness: 9mm / 0.35-inch; Inner Diameter: 21mm / 0.83-inch; Overall Size: 33 x 12.8mm / 1.3 x 0.5-inch(OD*H); Material: Nylon; Color: Dark GrayIn the package of: 2x HeatsinkIs there any advantages of the product?Made of nylon plastic, with a smooth surface and good insulation, it can well protect the cable and avoid cracking.How to use it?Steps of installation: 1.Trace the body of the grommet onto your desk; 2.Place the grommet in the hole; 3.Pass through your cable or cord.What should I notice?Please choose the correct diameter before purchasing.