ITEM NAME:Pure Copper MMCX Female Connectors Headset Earphone Screw Solder Connector Description: Suitable for headphones with a rear inner diameter of 6.2mm or more. Pure copper plated material, solid and durable, will not affect the sound quality of music. Easy to install and easy to disassemble. Specification: Material: pure copper gold plated Size: 10x4x4 mm / 0.39x0.15x0.15 inch Package Includes: 1 Piece Solder Connector 1 Piece Screw Bolt.1 Piece Solder Connector. Pure copper plated material, solid and durable, will not affect the sound quality of music. Material: pure copper gold plated. 1 Piece Screw Bolt.