The BLS 500 is the ultimate banana plug and has been designed and developed for connecting high-end speakers. The perfect silver plated copper contact is effectively maintained in position thanks to the Lock'In system. Using a banana plug is now safe and as reliable as screw clamping. Features: high performance banana plug - silver plated contact - Lock'in system for safe and reliable contact - compatible with 6 mm² cables. Packaging: delivered in a plastic tube with a hook containing 4 sockets.