With this dust protection from Delock, the socket is protected from dirt or damage. By using the dust cover, the sensitive connectors remain operational in the long term, especially in dusty environments and industrial areas. It is available in a pack of 10 with a handle. USB Standard: 2.0, 3.0. Special features: Port blocker. Connector type side B: Termination. Connector type side A: USB-C plug. Dust protection for unused USB-C ports.