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 20 x Banana Socket Item Type: Banana SocketMaterial: Brass, ABSPurpose: Suitable for Approx. 4mm / 0.16in banana plug connectorWithstand Voltage: CATIII 1KVMaximum Current: 32AHole Diameter: Approx. 4mm / 0.16inInstallation Hole Diameter: Approx. 12mm / 0.47inConnection Method: Welding 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.