These heavy-duty, premium grade banana plugs are designed to be attached to the end of speaker cables, facilitating high-quality connections to amplifiers, speakers, and binding posts. They simplify and neaten connections, suitable for equipment with 4mm terminals. The 24 carat gold plating ensures excellent conductivity for superior signal transfer and helps prevent corrosion and deterioration of speaker wire. These plugs connect speaker wire with diameters ranging from 3mm to 7mm. The overall length of each banana plug is 43mm, with a 13mm long pin that is 4mm in diameter, the standard size used globally. Speaker cable can be easily inserted through the side or top of the plug and secured with a screw mechanism. The plugs are stackable with existing 4mm banana plugs. For easy identification and correct polarity, the plugs are colour-coded; connect the negative wire (black) to the black plug and the positive wire (red) to the red plug. Using banana plugs prevents the oxidation and corrosion that can occur when speaker cables are connected directly, thereby improving sound quality and allowing for quick plugging and unplugging of speaker cables. Installation is straightforward: strip the speaker wire, insert it into the banana plug, and tighten the screw until secure. These are ideal for managing the numerous cables often found in modern audio systems, ensuring a secure and reliable connection.