Conwork 8-Pack 4mm Banana Plug Socket Connector Binding Post for Amplifier Speaker Terminal In-Wall Plate Insulated post, external parts insulated Easy installation with screws locking and easy to use Gold plated to protect against corrosion and to ensure the highest quality audio with no distortion Color coded black/red for maintaining proper polarity Package Contents: 8 x Banana plug(4Black+4Red). Limited lifetime Warranty and Product Support.