Protects your RJ45 female connector from dust and oxygen when not in use. Completely blocks gaps and prevents dust more effectively. A small handle allows for easy attachment and removal. Dustproof plugs made from ABS, a soft and flexible material, are easy to attach and remove. Environmentally friendly with no peculiar odor. Insulates and protects your computer interface, keeping it looking new for longer. Prevents moisture absorption that can lead to corrosion and short circuits. Effectively reduces static electricity to prevent breakdowns. Connect to protect open ports or identify dead ports. Prevents unauthorized use and guides users where to connect. Designed to fit all RJ45 Ethernet ports. Color: Blue + Black Material: ABS Package Contents: 100 * RJ45 Port Dust Covers 1 * Black Proprietary Lock and Key Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.