CLYXGS Transparent Binding Post, M4 Pure Copper Thread Screw, Gold Plated Pure Copper Binding Post, 4mm Banana Jack Socket, 12PCS 6 Red & 6 Black, for Speaker Amplifier Audio Equipment

["Made with pure copper core and full gold-plated finish, these binding posts offer excellent electrical conductivity, corrosion resistance, and minimal signal loss, ensuring pure sound quality for your audio system. The transparent crystal housing provides reliable insulation while adding a sleek, professional look.","Designed with a universal 4mm jack, these terminals fit most banana plugs for secure plug-and-play use. The 4.5mm wiring hole supports direct cable soldering or clamping, offering flexible installation options for different audio setups.","Overall length: 27.3mm; screw shaft: 11mm (M4/4mm diameter); max outer diameter: 15.3mm. Fits panels ≤3mm thick with a 4mm×5mm rectangular cutout, and includes all mounting hardware for quick, hassle-free installation.","Each pack includes 6 red (positive) and 6 black (negative) binding posts, with color-coded rings to prevent wiring errors. The gold-plated mounting tab and included nuts/washers ensure a tight, vibration-resistant connection for long-lasting performance.","Ideal for HiFi amplifiers, loudspeakers, car audio systems, test instruments, and DIY audio projects. Built to withstand frequent plugging/unplugging, these binding posts provide a solid, reliable connection for both home and professional use."]