3M R/Y+  Performance Plus Wire Connector, Red with Yellow Skirt, 100 Per Box
This best connectors do more than fit the application, they fit in your hand and they feel good to use. Replaces both red and yellow wing style connectors. 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. There's also less inventory to manage and a better chance you'll have the connector you need to do every job. Each box includes three connector sizes with increased range to handle the work of seven standard connectors. Dependable and UL listed, wire connectors are a great choice. Comes in 100 per box, 1000 per case.