ILSCO recently added an enhancement to its NIMBUS 4FLEX line of pre-insulated connectors. NIMBUS 2X now has a unique wire stop feature built into the connector that  allows an installer to use flex or code conductor on either side with no need to stagger the inputs and outputs, which optimizes space because 2X requires half the space as conventional connectors.  The company says another distinctive feature of the offering is the ability to mix any class of copper and/or aluminum conductor without concern for expansion, contraction and galvanic corrosion.

ILSCO