When not in , please the RJ45 female from dust and oxygen. Completely block any gaps and prevent dust more effectively.Little handle lets you easy to put on and .Anti-dust plugs made of ABS, soft and flexible material, easy to put on and .Environmental protection and no peculiar smell.Insulated and computer interface, to make it new for a long time. interface absorb moisture to prevent corrosion oxidation, leading to a short circuit. effectively reduce the static electronic products, to avoid a breakdown event.Plug it, open ports or Identify dead ports;Prevent ;Show users where to .Designed to fit into all Ethernet Port RJ45.Colour: blue + blackMaterial: ABSPackage Contents:100 * RJ45 Port Hub Anti Dust Cover1 * Black proprietary lock and keyOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.