BOSS Audio Systems 4BK 4 Gauge Amplifier Installation Wiring Kit is A Car Amplifier Wiring Kit helps you make connections and brings power to your radio, subwoofers and speakers. It includes GA OFC speaker wire x 16, gold-plated speaker terminals x 4, GA red power cable x 4, GA blue turn-on wire x 18, GA black ground cable x 4, competition quality fuse holder x 1, gold plated AGU fuse plus gold plated x 1, ring terminals x 2, split loom tubing x 1, rubber grommets x 4, wire ties x 20.