Associated Equipment Booster Cable measures 20' long and 4 AWG, with 500-amp, insulated safety clamps and side terminal adapters included. Associated has designed this professional-quality, heavy-duty booster cable with safety and convenience in mind to ensure quick and efficient connections, feauturing "Flexi-Spring" cable guards and 100% copper jaws (41, 300). This made-in-the-USA, heavy-duty-rated cable (SAE J 1494) also features a protective T-94 jacket, flexible to -40 F.