Gold-plated 2.5mm / 3.5mm Stereo Plug - Available in 7 colors
These are gold-plated metal 2.5mm / 3.5mm stereo plugs available in seven different colors. They match the 2.5mm / 3.5mm audio jacks we supply. The sound quality is very good due to the gold-plating. The back-end hole is 4mm by diameter. It is suggested you use high quality wires for longevity.