Connectivity. This premium stereo headphone adapter will allow you to connect your favorite pair of headphones and other stereo devices with pro audio and home audio equipment. It will convert a 3.5mm (1/8") female plug into a 6.35mm (1/4") male plug. It allows plugging a 3.5mm (1/8") stereo male audio plug into a 6.35mm (1/4") stereo female jack. Build Quality. All metal, 24k gold plated copper construction to ensure the highest quality audio connection. Specifications. Connector Type - 6.35mm stereo male TRS to 3.5mm female TRS. Connector Diameter - 6.35mm male (Plug) / 3.5mm female (jack). Gold-plated to resist oxidation. Stereo in & stereo out. 360 degree grip treads for easy plugging and unplugging. Length: 4.5cm. Weight: 8g. Model: 1 Pack: FOSCBL-2239; 3 Pack: FOSCBL-2284; 5 Pack: FOSCBL-2285.