Superior Material: All of these SC ring terminals are made of high quality corrosion resistant red copper, and the insulating covers are made of premium PVC material with good insulation, high temperature resistance and not easy to oxidize.< /p> Wire Contact Wells: These copper cores will provide you with increased current flow and less voltage swing to prevent wiring failures and reduce equipment downtime, they are designed with good conductivity, insulation and safety. Easy to crimp: construction terminals with high temperature durability and closed design seal out moisture, the connection is reliable and the flared opening of superior quality facilitates the insertion of the wire. Insulated covers are easy to use, just choose the right size to fit the cable Great value set: you will get 60 SC cold termination ring terminals including 8 types 4 6 8 10 awg and 60 pieces of 4 kinds of battery terminal harness insulator covers in 2 colors (black and red), totally 120 pieces to meet your various demands Multiple uses: our battery cable lugs can be used for automotive, rail transportation, machinery and equipment factories, distribution boxes, marine, golf carts, solar panels, home or outdoor applications, etc.