The battery inverter cable is made of 100% pure copper wires with nickel-plated copper Terminals which can offer maximum power transfer and corrosion protection. 20in 4AWG Gauge inverter cable , a set f positive (RED) and negative (BLACK) small cables great for connecting batteries in parallel or series . with the highly flexible insulation case can resist abrasion ,cut,tear,flame ,grease,oil and water . max load flow 200A (12V),it is used to connect power inverter, motorcycle, automotive, marine ,solar,ATV,RV