3M B/G+ Performance Plus Wire Connector, Blue with Grey Skirt, 500 Per Box Wire connectors are not only comfortable and easy to use, they simplify the selection of the right connector for a wide range of wiring jobs Each box includes three connector sizes with increased range to handle the work of seven standard connectors Best connectors do more than fit the application, they fit in your hand and they feel good to use Dependable and UL listed, wire connectors are a great choice Available in covers both the large blue and gray connectors