The NST-162-500-BLU is a 2-conductor 16-Gauge 65-Strand CL2-Rated Binary Speaker Wire with 500ft cable length (Blue). 500 Feet of professional quality speaker wire and a box that won't let you down. 99.9997% oxygen free conductors is used in our cable to ensure signal integrity and a lifetime of performance. Installer-friendly sequential distance markings, anti-snag dispensing slots and easy-to-strip jackets make Binary™ cable a breeze to work with.