【Premium Material】Our flexible hole grommets are made of high quality rubber material with good insulation, flame-retardant and folding resistance. Meanwhile, they are non-toxic & tasteless, anti-aging and safe. Thay all feature dust-proof, strong flexibility. So they can be used for a long time. | 【Pacakge & Suitable Size】The package comes with 20 pieces rubber hole plugs and 1 piece mini box knife for your convenience. Sufficient quantity and suitable specifications could meet your daily needs. For cabe grommets, the inside opening diameter is approx. 1"/25.8mm. Overall diameter is approx. 1.5"/38.4mm. Dirll hole size is approx. 1.1"/29mm. Groove thickness is approx. 0.3"/8.7mm. | 【Widely Usage】 Our firewall hole plugs not only help to organize the wire, cord and cable in order, but also protect wire, cable from pointed metal edges, and keep them from rubbing against metal, run wires through the applications. They can be widely applied to firewall, cylinder, pump, electrical appliance, spray, water pipe, frame, office equipment, computer components, entertainment systems and other applications. | 【Easy Installation】 The diameter of the dual sided grommet can be freely cut by the box knife that we provide, and snapping them directly into the drill hole effortlessly. Each rubber plugs is flexible and lightweight to carry. Give you good experience to use. | 【100% Risk-Free Shopping】 Zorveiio's products are backed by incredible customer service to make sure your satisfaction is guaranteed. If you have any other questions about it, please do not hesitate to contact us with Amazon email. We will reply and give you satisfying solution within 24 hours!