12pair/24 Open Set Screw Banana Plugs , no soldering needed Standard size fits most speakers The simple design of the banana plug makes it easier to create your own wires Accepts 12 to 18 Gauge Speaker Wire (connect from 2mm up to 4mm diameter speaker wire) Built with 24k gold plating which allows for more durability and prevention of corrosion. Red/Black Gear for Easy Channel Identification Banana Plugs 12 Pairs / 24 pcs, Open Screw 24K Gold Plated Plugs Audio Jack Connector for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems Installation: 1: Strip your speaker wire and depart the banana plugs 2: Twist the loose stands of wire Tightly 3: Insert the speaker wire through the side holes on the plugs 4: Tighten the screw securely (make sure there is only the wire core in the plug) 5: Connect to your audio receiver carefully Specification: Size: 4mm length: 40mm Surface Colour:Black + Red Material:copper Package Contents: 24x Banana Plugs (12 Red, 12 Black) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.