Feature: 1. EASY TO DISTINGUISH: Bright color marking is easy to distinguish, meet the needs of use, very convenient and useful 2. NO LOSS CONNECTION: Brass nickel plated contacts bring no loss in connection, ABS shell is insulated to prevent leakage 3. WIRE WELDING CONNECTION METHOD: The installation hole diameter is 12mm, the maximum panel thickness for 6mm, and using wire welding connection method 4. FOR 4MM BANANA PLUG CONNECTOR: Withstand CATIII 1000V voltage, maximum 32A current, suitable for 4mm banana plug connector 5. ENOUGH TO REPLACE: A total of 20pcs of banana socket binding post adapter, enough for you to replace and use Specification: Item Type: Banana Socket Material: Brass, ABS Maximum Current: 32A Hole Diameter: Approx. 4mm / 0.16in Installation Hole Diameter: Approx. 12mm / 0.47in Connection Method: Welding Package List: 20 x Banana Socket