Cliff CP30291 Black dust cover for RJ45 connectors

FT BLK METAL CAT5e RJ45 M3 - Cliff CP30291, The Cliff CP30291 is a black RJ45 dust cover designed to fit feedthrough connectors. They simply push in to the front of the RJ45 port to reduce the ingress of dust and dirt. Cliff CP30291 Black dust cover for RJ45 connectors

Price: 0.37 from Rapid Online Rapid Electronics Ltd.