Monoprice Choice Series 18 Gauge AWG 2 Conductor Speaker Wire/Cable - 100ft High Purity 99.9% Oxygen Free Pure Bare Copper For Home Theater, Car Audio And More Lifetime Warranty on ALL Cables: With Monoprice's Lifetime Warranty you can rest assured we stand behind our products and our customers. Oxygen-free 99.95% pure bare copper conductors 100 continuous feet of 18AWG 2-conductor speaker Wire | on a spool Clear, flexible PVC jacket with an easily visible blue stripe on one side for polarity identification One side of the clear outer PVC jacket is marked with an easily visible blue stripe to indicate polarity.