Premium Quality Material - The 3., 5mm connector is made of copper with gold plating., Anti-oxidation., Resistant to plug. 3Pcs 3.5mm Gold Plated Copper Male Stereo Mini Jack Plug Soldering 3PCS 3.5mm 3 Pole Connector with Light Black Stainless Steel Metal Case for Headphone Repair - Gold Plating Aux Replacement Jack Plug for Soldering Stereo Audio... You can save your headphones and enjoy the fun of DIY. 3PCS 3., 5mm 3 Pole Connector with Light Black Stainless Steel Metal Case for Headphone Repair - Gold Plating Aux Replacement Jack Plug for Soldering Stereo Audio Cable of Headset 3 Pole Connector Box 10A Range | Rapid Electronics Note - Due to the small size of the solder joints and the special connection method, please confirm whether there is a corresponding tool before purchasing. Audio Plug Repair Connector 3PCS 3.5mm 4 Pole Connector With Light Black Stainless Steel Metal Case TRS Male Plug For Headphone Repair You can refer to the steps in our picture for operation.