Description: Material: The ES3R inlet power socket is made of pure copper, ensuring good conductivity and durability. The body materials include high rigidity nylon and glass filler, providing robustness and longevity.Advanced Plating Process: This inlet Adapter features a 4 layer plating process which includes copper plating, silver plating (1.5 Micron), palladium plating, and rhodium plating (0.3 Micron). This enhances the performance and lifespan of the adapter.Dimensions: With dimensions of2.01inchx2.01inch, this compact adapter connector can easily fit into your audio system setup without taking up much space.Secure Connections: The ES3R adapter connector uses hex screws for connections, ensuring a secure and stable connection for your devices.Versatile Usage: Rated at 16A 250V A.C., this plug socket is suitable for various applications in your audio system setup with a fixed wire hole size of 5mm. Specification: 5.1cmx5.1cm/2.01inchx2.01inch Package Includes: 1inlet power socket(EU Adapter) Note: Please allow slightly errors 1-2cm differences due to manual measurement.