Geekria Upgrade Cable Replacment for Sennheiser HD650 HD600 HD580 HD525 HD565 Upgrade Cable / Headphone Replacement Cord 4 cores 6N OCC Neutrik silver-plated 6.35 plug, 1/4" TRS stereo High improve Analytics, Ultra-strong density, and quality of sound;Entire analysis of signal transmission, good at improving the tone quality Product Dimensions: 98 inches (2.5 m) Package Contents: Headphone Upgrade Cable X 1