6.35mm stereo plug to 3.5mm mono jack adapter 6.35mm stereo plug to 3.5mm mono jack converts 3.5mm mono plug to a 6.35mm stereo plug.The adapter is assambled of black molded plastic with nickel-plated contacts.Black molded plastic construction nickel-plated contacts connector 1: 6.35mm stereo plug connector 2: 3.5mm mono jack external length / height: 53.9mm body diameter: 11mm