3M™ Performance Plus Wire Connector B/G+JUG, Blue/Gray, 14-6 AWG, 250 per Jug

4#14-2#6-3#8 AWG, Blue with Gray skirt, 250 per container, 2000 per case

B/G + covers both the large blue and gray connectors. This simplifies 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.