Rubber Grommet protect wires, cables and pipes from damage by sharp metal and rough surface edges, allowing wires to safely pass through frames, firewalls, metal plates and other electrical equipment, and are widely used in homes, offices, industries, ships, etc.SpecificationColor: BlackMaterial: PlasticInner Diameter: 18 mm / 11/16"Slot Size: 22 x 3 mm / 0.87 x 0.12 inch (WxT)Total Size: 27 x 9 mm / 1.06 x 0.35 inch (WxH)Packing List: 20 Pcs x Desk GrommetAdvantageReliable Material: Firewall Rubber Grommet are made of rubber, which is flexible, has insulation protection function, durable and heat-resistant, dust-proof and flame-retardant.Neat and Organized Workspace: The Firewall Plug Grommet helps hide cables and wires, protect cables from daily wear and tear, and create a neat and organized workspace, avoiding clutter.InstructionPre-made notches, the aperture of the Rubber Grommet can be cut freely, just drill a hole of the right size on the mounting surface, and then put the wire hole cover into the hole to allow the wires to pass safely and neatly.NoteEnsure proper size and compatibility with the Desk Wire Cord Cable Grommet Hole Cover before installation.