500pcs RJ45 dust plug network cable crystal connector protective cover is made of silicone material, ensuring strength and long-lasting use. It is designed to provide protection to RJ45 connectors, keeping them safe from dust, dirt and water. The covers are easy to install and remove and ensure a secure fit for network cables. With yellow, red and black color options, you can easily identify different cables. Compatible with network cables, this set of 500 dust plugs is a must for any network configuration.