The 3M 61-S butt connector is a non-insulated, seamless connector crafted from tin-plated, annealed copper. Its double-length, round seamless barrel with a center stop is designed to permanently connect to the pre-stripped end of stranded copper wires. This connector is ideal for various electrical applications, including building wire and signs or fixtures, and is rated for a maximum voltage of 600 volts. It's a reliable solution for creating secure and lasting electrical connections in diverse industrial settings.