3MTM Performance PlusTM Wire Connectors O/B+ are constructed to work with a wire range between 2 #22 to 3 #12 AWG. The connectors feature a uniquely flexible spring that provides ample expansion capacity and a strong, reliable grip. Their expanded cable range allows three Performance PlusTM connectors to replace eight standard connectors, improving convenience at work by using fewer parts for a larger number of wire combinations. In addition, the flexible skirt helps reduce copper exposure for enhanced reliability, and the connectors are UL Listed for 600 V on copper wire.