1/0 Gauge Power/Ground Cable Specifications:1/0 Gauge Wire Can be used for Power or Ground Ultra Flexible CCA (Copper Clad Aluminum) Wire Xtreme Twisted This listing is for 50 feet of 1/0 Blue wire on the Spool. This wire is Ultra Flexible, and great for many car and mobile audio applications. This wire is made of extreme twisted CCA (Copper Clad Aluminum) wire.