With all the people using 8 gauge power cable for speaker leads on their subs, we saw the need for a twin-conductor speaker wire that would work on today's gigantic subwoofers. The MechMan 10 gauge oversized pure copper speaker wire features two 10 gauge wires mated together for easy speaker wiring. This heavy duty speaker wire is large enough for most any competition sub woofer, yet small enough to conveniently fit speaker and amp terminals properly. Each speaker wire is 207 strands inside a 5.5mm Blue soft touch PVC jacket for excellent flexibility. Spool length is 100 feet.