This 50-foot speaker wire is made of copper and comes on a spool. It is designed for connecting audio stereo systems, amplifiers, surround sound setups, TVs, home theaters, and car stereos. The wire is 12 gauge, providing a reliable connection for audio signals. Its length allows flexible installation in various settings, ensuring clear sound transmission. The spool makes it easy to handle and cut to the desired length. Suitable for both professional and personal audio setups, this copper cable offers durability and consistent performance.