Probably the best pure copper cable I've listened to till date, PWA Attilia is a 4W OCC Copper cable that comes as a stock cable with UM Mason FS. I sold my Mason FS earlier but kept the cable because this cable pairs so well with most of the iems. This cable is 2 pin with 4.4 mm balanced output.

Retails originally for $2000. This will be shipped in a leather puck case for safety.

Shipping is included in North America.