I pressed a piece of thin music wire and removed it. Then I put it on a 1.5mm thick carbon fiber rod and it fit perfectly. 1mm has been loosened, 1.5mm has been tightened so it's not that much as I said before.
Pros
Overall length: 5 m / 16.4 ft; Temperature range: from -55 Π‘ to +105 Π‘; for: headphones, stereo audio system