These RJ-45 dust covers install in any standard RJ45/LAN slot, keeping the open ports on your device safe from dust and debris. 100 dust covers are included ensuring you'll have plenty on hand for all the ports in your server room or network closet. Protect Your Network Equipment The dust covers install into any standard RJ-45 network port that's not currently in use. By blocking the port you can prevent dust from getting inside of your switches, routers, servers and media converters, preventing network errors and potential downtime caused by dust and debris in open slots. Easy to Install and Remove Featuring a convenient outward facing pull-tab, these snap-in Ethernet port protectors are easy to insert and pull-out, without disrupting adjacent ports or cables. These RJ45 blanking plugs are TAA compliant and backed by a 2-years StarTech.com warranty, with free lifetime technical support.