EFX Ultra-Flex Multi-Conductor Speaker wire strictly follows the American Wire Gauge standard ensuring that your amps and speakers are getting the power that they need to perform at their best. The ultra-high strand count and PVC jacket increase the flexibility making for hassle-free installations. Each individual strand of the Oxygen Free Copper wire is plated with tin to prevent oxidation and provide unmatched reliability. EFX Ultra-Flex 9Wire is available in 12 20 and 250 Lengths.