This 16 AWG four-conductor wire is ideal for runs to multiple speakers or receivers. The polarized wires are colour coded in red, black, green, and white plastic sheaths to make identifying the positives and negatives easy no matter how long the distance. 99.99% oxygen-free copper conductors carry crystal clear sound while reducing the risk of degradation and corrosion over time. A white PVC jacket and stranded copper design means this cable can handle the bends and twists of any indoor installation. It also means this wire is sturdy and protected enough to stand up to countless years of use. Sequential length markings along the cable jacket take the guesswork out of measurements and the pull-through box saves you time by preventing kinks. This 500' box of 16 gauge wire is perfect for many projects including surround sound and intercom systems. With a CL3 in-wall rating, it is designed to meet the National Electrical Codes (NEC) standards for fire safety.