Item Type: Banana Socket_x000D_ Material: Brass, ABS_x000D_ Purpose: Suitable for Approx. 4mm / 0.16in banana plug connector_x000D_ Withstand Voltage: CATIII 1KV_x000D_ Maximum Current: 32A_x000D_ Hole Diameter: Approx. 4mm / 0.16in_x000D_ Installation Hole Diameter: Approx. 12mm / 0.47in_x000D_ Connection Method: Welding 1EASY TO DISTINGUISH: Bright color marking is easy to distinguish, meet the needs of use, very convenient and useful 2NO LOSS CONNECTION: Brass nickel plated contacts bring no loss in connection, ABS shell is insulated to prevent leakage 3WIRE WELDING CONNECTION METHOD: The installation hole diameter is 12mm, the maximum panel thickness for 6mm, and using wire welding connection method 4FOR 4MM BANANA PLUG CONNECTOR: Withstand CATIII 1000V voltage, maximum 32A current, suitable for 4mm banana plug connector 5ENOUGH TO REPLACE: A total of 20pcs of banana socket binding post adapter, enough for you to replace and use20 x Banana Socket