[CLOSED TYPE DESIGN WITH DUAL SCREWS] Banana Plugs Audio Jack Connector, 24k Gold Dual Screw Lock Speaker Connector for a of use, with a crystal clear signal. [Wide applicability] for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver and Sound Systems. [EASY INSTALLATION/MATERIAL] Banana plugs make speaker wire installation a breeze and are great to use with A/V receivers, amplifiers, surround sound systems, banana wall plates. Gold plated,non-magnetic. [COLOR CODED AND GOLD PLATED CONNECTORS] Banana connectors are gold plated to resist corrosion and the collar is color coded for polarity identification. [WORKS WITH MULTIPLE SIZES OF SPEAKER WIRE] Accepts wire size up to 4mm. Accepts 12 AWG to 18 AWG speaker wire.Double screws locking, no soldering. Type:Audio Adapter/Converter Copper made, non-magnetic. Accommodate cable with wire size up to 4mm, Double screws locking, no soldering. Easy to fit for wire size up to 4mm. Accept speaker wire:8AWG, 9AWG, 10AWG, 11AWG, 12AWG, 13AWG,14AWG, 15AWG, 16AWG, 17AWG, 18AWG, 19AWG, 20AWG. Colour:Silver Material:Aluminum + copper head Size:1.87x1.87x4.45cm Package Contents: 12 * audio jack connectors (6pcs red circle, 6pcs black circle) Only the above package content, other products are not included. Note: Light reflection 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.