This 100 ft. 14/2 Speaker Wire features a clear-stranded design for easy organization. This Southwire Zip Speaker cable consists of two stranded conductors. One conductor is bare copper; the other is tinned-copper, which is copper with a thin layer of tin on the surface. Tin represents less than 5% of the composition of the conductor, so the effect on electrical resistance is negligible for the relatively short distances used for wiring speakers. The color difference between bare copper and tinned-copper helps to distinguish conductors to ensure proper polarity for speaker wiring.The spool packaging enables convenient distribution. Suitable for use in wet locations, indoor or light duty outdoor use.