Monoprice AffinityTM Series Banana plugs make speaker installations easy. They are designed for use with amplifiers or speakers that use binding posts. These high quality plugs feature a dual screw fastening system that can accept bare speaker wire from 10 to 18 AWG. Each pair comes with one plug color coded red and the other coded black; for easy polarity identification. The plug body is made of copper fitted with a ferromanganese tip. The entire plug is then plated with gold to help prevent corrosion. Features: Can accept bare wire and spades Color coded black/red rings for maintaining proper polarity Secure; positive contact with binding posts Corrosion resistant; 24K gold plated finish Copper body construction and ferromanganese tips AffinityTM is a trademark of Monoprice Inc.