Chassis wire is multi-stranded copper, with a colored outer jacket. It is often used inside of speakers and electronic devices, such as amplifiers. Chassis wire is sold by the any length.
Cardas chassis wire uses the same ultra pure copper, Golden Ratio stranded litz wire found in all Cardas cables.
If you haven't worked with Litz conductors, please visit Cardas Litz Wire Info page:
http://cardas.com/litz.php