PURE AUDIO OCC Premier Silver and Copper interconnect cable. As befitting our best cable it comes in a jewelry box. OCC stands for OHNO Continuous Crystal. One crystal from beginning to end. The silver cable is 5N purity and the copper 6N purity. It is painstakingly woven into a true litz weave. The connectors are KLEI (Keith Louis Eichman) Copper and Silver Harmony. This cable strips away veils from your music. So natural, so detailed, so dynamic, so transparent and what a huge soundstage with superb imaging.