20ft Heavy Duty 4 Gauge Professional Grade Jumper Cable Can be used for jumping start when battery is up for cars, trucks, boats, snowmobiles, ATVs, etc. Color-coded insulated handles with extra-strong copper alligator clips. Copper Coated Aluminum Conductor Heavy Duty 4 Gauge Cable and Clamps Fits both 12 and 24 volts. Comes in a vinyl storage bag.