Audio/video installations in educational and commercial settings often require plenum-rated cabling. . This wire is constructed from two color-coded 18 AWG twisted pair copper cables (one red, one black) to ensure easy identification. The speaker wire is twisted within a naturally colored jacket for easier pulling and installation.Each conductor is made from seven strands of 26 AWG copper wires and features 100% foil shield with stranded copper drain wire for easy grounding connections. CMP rating meets building code requirements to run within walls and air plenums without the need for conduit. Wire shows footage markers for easy length tracking.