FiiO RC-UE2 47.2" Cable for Ultimate Earsand M-Audio Headphones Silver plated copper wire core with a Teflon outer skin Knitting structure with 8 separate wires that each have 11 pieces of wire core inside Copper plated gold 3.5mm stereo straight mini-plug Dual copper plated gold RC-UE2 plugs with hollow design and 0.75mm diameter Compatible with several Ultimate Ears and M-Audio headphone tips