M4 Screw CoverThe diameter of this plastic screw cover is about 14 mm, and the diameter of the hole is about 5 mm. Anti-rust DesignOur screw cover can prevent the screw from rusting, and prevent the screw from being corroded by sunlight or water, and extend the service life of the screw. The nut provides good rust protection for your screws, and can also decorate furniture and walls. Durable Plastic MaterialThe screw cover is made of plastic. The beautiful material is waterproof and sun-proof, anti-corrosion, not easy to fade, non-toxic and has no uncomfortable smell, strong and durable, and not easy to break. Easy to UseThe two parts of the screw cover are connected to each other, which is very convenient to use. Just pass the screw through the hole in the plastic screw cap, tighten the screw to the correct position, and then close the cover. The Best Choice for DecorationsThe black screw cap has a beautiful appearance and is suitable for homes, shops, warehouses, bars, restaurants, and can be used to decorate furniture, walls, terraces, cabinets, etc. The screw cover can well protect the screw and keep its appearance.