4PCS Gold/Rhodium Plated HiFi Amplifier Speaker Binding Post Socket Terminal Features: 1. Specially designed for DIY projects, high-quality black shell with oxidation resistance and low distortion. 2. Primarily utilized for amplifier box terminals and speaker terminals. 3. The terminal block measures 50mm in length, suitable for board thickness up to 5mm. 4. No soldering required, features hexagonal screws. Specification: Total length: 50MM (��0.3) Screw length: 8.5MM Wiring port: 4MM Package Included: 4*Terminal Block Note: 1. Due to manual measurement, please allow 1-3mm error. Please ensure you are comfortable with this before placing an order. 2. Please allow 1-3g weight error. Please ensure you are comfortable with this before placing an order. 3. Due to varying lighting conditions in photos and differences in monitor settings, the images may not accurately represent the actual color of the item. Please ensure you are comfortable with this before placing an order, thank you!