4PCS Gold or Rhodium Plated HiFi Amplifier Speaker Binding Post Socket Terminal Features: 1. DIY special, high-grade black shell, oxidation resistance, small distortion. 2. Mainly used for amplifier box terminals and speaker terminals. 3. The terminal block is 50mm long, recommended for board thickness within 5mm. 4. No welding, hexagonal screws. Specification: Total length: 50MM (±0.3) Screw length: 8.5MM Wiring port: 4MM Package Included: 4xTerminal Block Note: 1. Due to manual measurement, please allow 1-3mm error. Please make sure you don't mind before ordering. 2. Please allow 1-3g weight error. Please make sure you don't mind before ordering. 3. Due to different lighting in the photos and differences in monitors, the pictures may not reflect the actual colour of the object. Please make sure you don't mind before ordering, thank you! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.