HIGH QUALITY CABLES - This 4 Gauge Amp Wiring Kit features a blend of heavy-duty oxygen-free copper and copper-clad aluminum in a hybrid power cable designed for excellent conductivity, durability, and value. SUPER PROTECTION - With an in-line fused holder and weatherproof covers, your amplifiers and subwoofers are securely safeguarded against any and all environmental hazards. This 4 Gauge Amp Wiring Kit also makes wire routing conveniently simple and install-ready. EASY INSTALATION - The 4 Gauge amp wiring kit provides an easy to install solution for installing your amplifiers and subwoofers. With its double strength ground terminal and pre-terminated fuse and power cable, the kit provides an efficient and convenient method for wiring up your system. NOISE REJECTION - Our twisted pair.