This wire has been tested by UL and meets the standard of CMP, or plenum. As such, it is permitted for use with all in-wall, plenum, and riser applications. Improved data and signal transfer over longer cable runs with 0.50mm thick copper conductor. 99.9997% oxygen free conductors is used in our cable to ensure signal integrity and a lifetime of performance. Oxygen Free Cables (manufactured in an oxygen free environment) drastically reduces signal distortion for unrivaled audio clarity using 99.9997% oxygen free conductors. Installer-friendly sequential distance markings, anti-snag dispensing slots and easy-to-strip jackets make Binary™ cable a breeze to work with.