[Updated Version] Cable Matters 5-Pack 1/4 inch 6.3mm to 3.5 mm Adapter - Now Made of Solid Copper for Improved Durability & Longevity Re-engineered version made of solid copper to be more durable and last longer. 5-pack 6.35mm to 3.5mm stereo adapters allow a 6.35mm (1/4 inch) stereo port to accept a stereo cable with a standard 3.5mm (1/8 inch) plug Connect headphones to audio devices such as amplifiers or AV receivers with 6.35mm socket Convenient and cost-effective 5-pack 1/4 inch to 1/8 inch stereo adapters provide spare or replacement adapters to use on different audio systems Gold-plating resists corrosion and ensures minimal signal loss. 360 degree grip treads help easy plugging and unplugging