Here is a link to the Mainline page in the Bottlehead store -
Mainline(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fbottlehead.com%2Fwp-content%2Fuploads%2F2013%2F12%2Fmainline_headphone.jpg&hash=f8fe4d5161cb3c0f45f5a9a81fd4f612287ad424)
