Straight Barrel Copper Battery Terminals are die-cast and manufactured from copper and tin plated. Cable sizes range from 6 AWG to 4/0 AWG. Contains and average of 25% more copper than competing battery terminals and are designed to hold up to the heaviest demands of your electrical system. Cable size as well as polarity are molded into the terminal for easy identification. Flared entry makes cable insertion easy. The tin plating means that these battery terminals are easy to solder or they can be crimped as well. Comes with a bolt and nut to secure the terminal to your battery post.