[Closed Design with Double Screws]Banana Plug Audio Connector, 24K Gold Double Screw Lock Speaker Connector for Lifetime Use with Signal. Isolate the wires and prevent from shorting out, and two set screws the wires are connected securely.[Easy Installation/Material]Banana plugs make speaker wire installation a breeze, perfect for use with A/V receivers, amplifiers, surround sound , banana wall panels. Material: pure copper, gold-plated, pure copper, non-magnetic.24k gold plating for maximum signal transferanddurability[Speaker wire suitable for many sizes]Accepts wire size up to 4.5mm. Compatible with 8AWG to 20AWG speaker wire. Double screw , no welding.High Surface plating: plated 24K goldWiring : double screw fixation, surface weldingAccess : 4.5MMWiring : double screw fixation, no weldingColour:blackandsilverMaterial:MetalPackage Contents:20 x Banana Connector 4.5MMOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.<br> 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.