CCA (COPPER CLAD ALUMINUM) u2013 CCA wire offers the same signal frequency and reliability in terms of corrosion resistance to copper wire. The advantage of the CCA speaker wire is lighter and more flexible than copper wire. The cost of CCA vs Oxygen free copper is much lower and you can enjoy the same functions and reliability as copper wire without paying the extra cost for the installation. Tough yet flexible white insulated jacket is market with a stripe on one side for polarity and is marked with FT count for easy installation. The 43 Strands 0.16 mm conductors provide exceptional performance sound quality for professional speaker and audio connections18/2 cable rated CL2 for in-wall use complies with fire safety for use inside the walls of residential class buildingsPull-Out Box with multiconductor cable reduces need to pull multiple wires for easy installation