6651-050 4 GA MAX„Copper Copper Butt Splice Connector (50 PCS) - MAX„Copper copper butt splice feature 100% seamless copper tube construction and are tin plated to increase conductivity and corrosion resistance. They are ideal for general wiring and starter or ground connections and they can be either crimped or soldered to the cable end. Seamless 100% copper tube construction, tin plated,Can be crimped or soldered,Ideal for general wiring as well as starter or ground connections