1 set Banana Plugs (12 Red, 12 Black) & 1 set 328PCS(8 Sizes) 2:1 Heat Shrink Tubing 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 Logos 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 Size: 4mm length: 40mm Surface 2:1 Heat Shrink Tubing: Big collection of heat shrink tubing,8 Specifications,5 colors,328pcs Supplied Internal Diameter: 1.0mm, 2.0mm, 3.0mm, 4.0mm,6.0mm, 8.0mm, 10.0mm, 14.0mm Shrinkage Ratio: 2:1 (will maximum shrink to 1/2 its supplied diameter) Operating Temperature: -55 Celsius to +125 Celsius Minimum Shrinkage Temp: +70 Celsius Full Shrinkage Temp: +110 Celsius Maximum Tensile Strength: 10.4 Mpa Dielectric Strength:15 kV/mm Flammability: Flame Retardant Color: as shown Material: PC & copper Package Contents: 24x Banana Plugs (12 Red, 12 Black) 1 set x 328PCS(8 Sizes) 2:1 Heat Shrink Tubing