Rockford Fosgate RFCK-4 4 AWG Capacitor Install Kit FULL spec cable - meets or exceeds AWG (American Wire Gauge) requirements|100% Pure Crystal-Oxygen Free Copper (PC-OFC)|Includes appropriate wire termination hardware|4AWG (21.1mm) 1,862 strands|1 Year|Standard Warranty Compatible with RFC1 and RFC1D Full AWG american wire gauge spec 100% oxygen free copper 6 feet 4 AWG power wire Includes munting hardware