MUSB2D11004BP is a dust cover assembly designed for single USB Type B receptacle connectors mounted on panels. The cover is constructed from silicone rubber (grey color) with a brass bushing that is nickel-plated, providing durable protection against dust and environmental contamination. It features a 4-40 screw mounting interface for secure panel attachment and operates reliably across a temperature range of -40°C to +105°C. The product is RoHS compliant per EU Directive 2002/95/EC, making it suitable for applications requiring environmental protection of USB connectors in industrial, commercial, and consumer electronics equipment.