Cliff CP30293 Black dust cover for USB2-B connectors

FT BLK METAL CAT5e RJ45 M3 - Cliff CP30293, The Cliff CP30293 is a USB Type B dust cover designed to fit feedthrough connectors. They simply push in to the front of the USB port to reduce ingress of dust and dirt. Cliff CP30293 Black dust cover for USB2-B connectors

Price: 0.57 from Rapid Online Rapid Electronics Ltd.