More on Amazon.com : http://www.amazon.com/gp/product/B002CSDV0Y?tag=purrfectcatdi-20

C2G / Cables to Go 40538 18AWG Plenum-Rated Bulk Speaker Wire (500 Feet Natural)

Audiovideo installations in educational and commercial settings often require plenum-rated cabling Our plenum-rated speaker wire was engineered to overcome common challenges faced by installers